Teria has golden eyes and long black shoulder-length hair with Chinese double bun. Her chest is noticeably more well endowed than her sister's, and she gets teased for it occasionally. She wears a black jacket over her white Chinese dress with few differences from her sister's, having a shorter skirt length at above knee level and a cutout at the chest showing off her cleavage, along with white thigh high socks and pink shoes.
Unlike her sister, who is louder and abrasive, Teria is quieter and shy. She seems to love mangas, as seen when she reads one in Inuzuka's room. She is weak to dogs but is determined to protect students no matter what as a Prefect. She is also extremely clumsy, troubling those around her.
She has feelings for Romio but can't bring herself to admit them, even though her sister is fully aware of it. Even after finding out about his relationship with Persia, she still supports him.
Romio & The Prefects
Teria and her twin sister Kochou overheard a conversation from some students about the festival tonight. They went to see Airu to ask if he wants to come and to hang out with them. He refuses, saying they are Prefects. Their job is to guide and to protect the students. They should just patrol to prevent any trouble.
One day, they were saving a cat from a tree. Kochou jumps down and lands on Inuzuka's arms. Teria then jumps as well, but lands on his body. They explain that they are not middle school students but high schoolers who skipped grades. They are even in the second-year. Hasuki showed up asking what Inuzuka is up too. He said that these brats are messing around with him. Hasuki takes a good look at them and realizes they are Prefects. She then apologizes to them for Inuzuka's sake. Inuzuka asks why she would do that and Hasuki explains they are Prefects. Kochou asks if he is scared now, but Inuzuka answers he isn't. These Prefects are nothing but annoying to him, and he adds they should just go home. Pissed, Kochou explains that age doesn’t matter. If they are gifted with talent, then they should use it to protect others. She begins to change the topic and asks what secret conversation he was having under the bench earlier. Inuzuka lied that he was talking with the ants asking if they would come with him to the festival later. The three of them then pity him and comment on how he is lonely.
Later, when they went to his room without his permission, Teria was reading one of his books and wait for him. When Inuzuka returns, his eyes were stunned for seeing them here. He asks why they are here, and they said that they just want to hang out. They then ask Inuzuka where he got the rosary they found in his room. Why does a Touwan have one in the first place? Inuzuka rushes to them to get it back, but he was pushing Teria to his bed and made her uncomfortable. Kochou is angry at him and asks what he is doing to her sister. After Inuzuka apologizes, she was getting suspicious seeing him panic like that. There must be something about the rosary. Inuzuka ran outside and hammered his door with nails to prevent them from getting out. Hilariously, he didn’t find out that Kochou and Teria were helping him to seal his door. When he realized it, he pint a fire extinguisher at them. Then, he ran away from the dorm and from them. They lost him, though the students are going to the festival right now. Kochou decided to go there as well. Teria was happy to hear that, but it was just to do Prefect duty, which makes her sad. They are at the festival patrolling around and looking for Inuzuka. The twins observe everyone who is having fun. They then found the delinquent who seems to be having the time of his life. He is surprised they were still following him. They stated it's work. They have the right to punish students who are having too much fun and messing around. He immediately runs away. They lost him again even after searching for the entire festival. Teria then believes he is hiding in the woods. They heard a sound, but what they see is just cows. They keep looking for him with no luck. They see that everyone was having fun. Teria wanted to ask if they could... But Kochou replied they can't.
They heard trouble from a distance and went to check it out. There was one Black Dog and one White Cat students fighting with one another. If this keeps up, then the fireworks would be canceled. Kochou and Teria then stop the fight before it could get worse. The crowd is impressed and adds they are Prefects, after all, saddening them. Inuzuka is still nowhere to be seen. They decided to give up until Inuzuka hit Kochou's head with a rubber bullet. He wanted a match with them. If they refuse, he will destroy some stalls. They said they don’t have time for games, but Inuzuka said it’s a battle. They then accept the challenge. They fight in a game after another, and Kochou and Teria were having fun. When Kochou asks what is the next match they will be having, Inuzuka said that’s enough for now. But they can call him if they want to have some fun again. They just want to have friends to hang out with the festival. He heard it from their classmates. They are still kids and should not spoil themselves. Although Kochou doesn't want them to be treated as kids as they are Prefects, she said if there is some time to be spared, they'll keep him as a company again. They then say goodbye to Inuzuka and leave heading back.
Romeo and Teria
~ Main article: Chapter 19 ~
Inuzuka went into the office to meet Kochou and Teria asked to be their Servant. He wants to know more about being a Prefect and wants them to teach him. He wants Teria to be his master. Teria suggests it should be Kochou, but Inuzuka said she was just nonsense. Kochou was pissed, thinking he was just aiming for her sister’s breasts. She then left the office, leaving the two of them alone. Teria then hides behind the curtains, thinking he wants to hurt her. It’s because that Kochou said he was aiming for her breast, but Inuzuka told her not to take it seriously. Inuzuka started to notice her attitude has changed after Kochou left. Anyway, Inuzuka wants Teria to teach him about a Prefect's jobs. Teria shows Inuzuka all the Prefect's duties but from afar, making it difficult for Inuzuka to hear her. Inuzuka doesn’t know if he can do it, but he has expectations of Teria and believes she is good with the actual job. Teria is fired up and brings Inuzuka to each of her duties.
Their first duty is to feed the dorm dog. Teria tried to feed the dorm's dog but was based on how things were going. Inuzuka released that she was bad at doing her job. But he doesn’t want to believe it like that yet since she’s a Prefect. Their next duty is to discuss with some club members about their funding. When they enter the room, each of the club members was complaining about how their funds are not enough. They were complaining so hard that Teria believes she’s going to die. Sieber then enters the room since she has the same duty with Teria. She took care of the situation easily by punching the White Cats House's Head Prefect Cait Sith that the club members went silent, scared. Before Sieber is about to leave, she gives Teria a lesson. She's always hiding behind her sister's shadow and can't do anything if they are apart. She is a Prefect and should do better next time, or else everyone will look down on her. Teria is upset, but it’s the truth. She wasn’t fit to be a Prefect. The reason why she got this far is that her sister helps her even now. Teria was about to leave saying he should be Kochou’s servant instead. However, Inuzuka told her to wait. He knows that the older sibling always gets respect. She shouldn’t say she can’t do it. After all, she is his master.
They continue to do every task that’s left. Unfortunately, they fail every single one of them. They still haven’t patrolled the area since there are wild dogs around the school. Speaking of wild dogs, there was one chasing two elementary kids. Inuzuka told Teria to run while he took care of it. But when he turns facing her, she is gone. She runs towards the kids to protect them. Inuzuka was surprised and thought that she was weak with dogs but was based on how she looks terrified. Even though she is scared, she is determined to protect the students. The dog jumps toward Teria, but Inuzuka grabs it while telling Teria to capture it. Teria took out her net and caught the dog with Inuzuka in the process. The kids hug Teria and thank her for saving them. Teria was hayed that she even forgot about Inuzuka in the net and his complaining to free him.
Teria and Inuzuka were heading back. Teria then asks why he wants to be a Prefect in the first place. Inuzuka replied that he made a promise to someone that he will change the world. But to do that, he needs to be a Prefect. Teria told Inuzuka there is no way he could be a Prefect now, but she will always support him since she is his master. Teria then left heading back alone.
Romeo and Kochou 1 and 2
Kochou and Teria were looking for Inuzuka to discuss something. They ask the students to help to look for him with them. After finding him, they told that the ministers of Touwa and West would be heading to Dahlia Academy for an inspection. As Prefects, it’s their job to give them a tour of the school. The Black Dogs Head Prefect Airu won’t be joining since he has another job to do. So it’s up to Kochou and Teria, and they want Inuzuka to help them out.
They went to the main gate to wait for their arrival. The White Cats Prefect, Sieber along with her support Persia and Scott were also there to greet them. Inuzuka was all fired up. During the meantime, a cricket has land on Teria’s shoulder which frightened her. She panics towards Inuzuka and accidentally pulls down his pants. The ministers from both nations have arrived and seen Inuzuka with his pants down. The minister of Touwa was mad, calling him a lolicon. Kochou tries to change the topic and greets them to the school. But both ministers were concerned why a child should be a Prefect. Sieber then introduces herself and wants to take them into the school. Both ministers see a great greeting from her. The White Cats seem to show a better attitude than the Black Dogs. The Touwan minister then asks where is the toilet. Inuzuka and Teria see a chance to turn the tables. Inuzuka carried the minister and rushed towards the toilet. But they accidentally bring him to the ladies' toilet since Inuzuka was running so fast. The minister crashes, and his head is hit through the door. They apologize for being so careless. The minister from the West laughs for their carelessness. Though, she says it can’t be helped since Teria is a child after all. Inuzuka tried to shut her up, but Kochou apologizes to her saying they will be more careful next time. The minister then continues saying that she doesn’t care what happens to the Black Dogs, but she thinks that Teria becomes a Prefect because it’s fun. Kochou then snaps and punches her in her mouth. She wants her to take that back the words that aren’t true. Sieber stops Kochou and brings the ministers to the school. Kochou got in trouble and can’t tour the ministers anymore. She apologizes to Teria, saying she wants to do this job so people would change their options on her. But only Kochou the one who got in trouble. Inuzuka and Teria will have to show the best hospitality they will ever have.
Both ministers were about to leave, but the students managed to talk them out. They take them to tour their facilities. Inuzuka makes Teria put on a maid outfit that both the ministers give positive comments. Teria introduces the minister to their potteries and asks if he wants to hold one. The Black Dog minister said he does, so Teria went to grab it. But she tripped and hit the minister’s head. She messed up again. The next tour is both dorms. Inuzuka and Teria bring the minister of Touwa to the Black Doggy’s dorm. They drag him to the public bath and insist him to take one right now. The one who will help him bath will be Teria which the minister refuses right away as he knows what will happen. Teria ran towards them and tripped hitting the minister to the bath.
They still couldn’t impress them. The two of them were thinking about what would the minister wants. During that time, some elementary come to play with them. They said they are busy right now. The kids then decided to help since Teria always help them. More students came to tell them if they needed help. Inuzuka then has an idea. He went to every student, asking for their help to impress the ministers. They all agree to help and went to give the best hostility to the ministers as they can. Things were going very well. Kochou came in wondering why everyone is helping out. Inuzuka explains that he went to call for them while adding: “Teria is in trouble”. They want to help since Teria helps them from behind. So they want to return the favor.
It’s time for the ministers to take their leave. They said that was a wonderful inspection. Teria apologizes for all the trouble she had done to the Touwa minister. But he said it's fine. In fact, he finds it enjoyable. The students here manage work together while live vivid lives. The minister of the West still said that the White Cats did a better job, but she takes her words back what she said earlier. Both ministers then leave.
Romeo, Teria and the School Festival 1 and 2
The school festival opens today! Teria went to meet Inuzuka to confirm something. Earlier, she had a conversation with her sister if she actually likes Inuzuka. Kochou replied the only way to find out is to go on a date with him at the festival. She has a heart monitor which will beep if her heart crosses 120 bpm. If it rang five times, then it proves she does like him. Teria meets Inuzuka and hangs out with him with a dress. Teria was thinking about it that she didn't notice a horse carriage that was heading to her way. Inuzuka grabs Teria and pulls her out of the way. It makes her heart racing fast, causing the alarm to beep. They then went to a café where Hasuki is working at. They tried to grab a meal. A waitress serves them sweet potato even though they didn't order it because of Kochou. It's a game. The two of them will bite each end of the fry and finish the whole thing. The first one who let go loses. Teria blushes and the alarm beeps again. They then leave heading to another café.
They went to a White Cats café that is head by Rex. The café will introduce some cut clothes for customers to look at. Sieber makes Persia wearing some cute clothes that she even made Teria wear one as well. Inuzuka finds her cute, and Teria's alarm then beeps for the third time. Kochou showed up, saying she also looks cute. She should admit that she does love Inuzuka. It is forbidden to have a relationship with their Servant. So if she does love Inuzuka, then she will have no choice but to release him being her Servant. Kochou then realizes what she has done. Inuzuka is aiming to be a Prefect, and he is going to lose his position because of her. Teria decided to leave, but she tripped. Inuzuka rushed towards her and decided to carry her to the infirmary. Teria then blushes and the alarm beep for the fourth time. Kochou believes it's over.
At the infirmary, the nurse is out, so Inuzuka has to aid Teria himself. While being an aid, Teria’s alarm beep for the fifth time. With five beeps, she can’t hide the fact that she does like him. Inuzuka tried to hold her forehead to see if she has a fever. But he was so close that Teria had to push him away. Kochou then showed up and hugged Inuzuka right away. Kochou said that Inuzuka actually likes her. He was over her since the first time she met. Inuzuka told her to be quiet since it isn’t true. Teria looks jealous and makes a sad face that even Kochou herself has never seen it before. She runs away while saying she hates her.
Inuzuka went outside to look for her. Teria kept hiding away from him as she didn't want to be found. She went to hide at the stage where people performed. Teria could see that she didn't cut out to be a master at all. She should just release Inuzuka right now. Inuzuka went to the stage to look for her. Lighting then shocked and made all the lights and speakers turn off. Aby, who is supposed to perform next, couldn't go unless the lights and speakers are working again. Inuzuka says he will look for Teria since she is good at repairing this stuff. Aby didn't understand how Teria could help at all. Inuzuka answered not to underestimate her. She could be shy and nervous, but if it were for the sake of the students, she will sacrifice anything she could do to help. That's why she is the one who can proudly call herself his master. Teria overheard it and finally realized Inuzuka was putting a lot of faith in her and she was just there not putting her effort. She showed up to help them fix the stage. It took a lot of time, but they managed to fix it.
The first day of the festival is almost over. The two of them were walking to head back. Inuzuka asks Teria if she is alright since she doesn't look like herself today. She said she was alright. It may be love she is feeling, but she wants to hide these feelings so she could support Inuzuka to grab his dreams.
Romio, Teria, And The Final Exam
~ Main article: Chapter 69 ~
The final exam is three days away. Every student is putting a lot of effort into it. The Black Dogs are doing their camp again. But this time, Inuzuka isn’t joining. He said he wanted to study alone. Teria is concerned, so she pays him a visit. When she opens his door, Inuzuka was in front of it, making a dying face while begging for water. He shocked Teria at first, but she rushes to grab some for him. After Inuzuka been revived, Teria asks if he's been sleeping lately. He stated he had’t slept since the test break, which was four days ago. He couldn’t have time to sleep with all the stuff he has to deal with lately. Teria told him it isn’t good to push that far, but Inuzuka said he must. This is the final exam, and if he gets to the top 10 announcements, he will get respect from the students. Anyway, Inuzuka asks what business she has in his room. Teria asks if he needs some help, but Inuzuka said he’s fine. This makes Teria depress, which makes Inuzuka change his mind. First, he needs help with some library subjects, but Teria isn’t good at it. He then needs help with maths, but Teria gives Inuzuka too much difficult information that he couldn’t understand a word. Inuzuka decided to study alone again. Teria thought that she was useless to him. Inuzuka told her not to misunderstand. He wanted to study alone since the beginning. If he wants to be a Prefect, he must do it alone. Teria understood and left.
When she was out, three students were heading to call Inuzuka. Teria asks them what they want from him. Each student explains their problem that only Inzuuka can handle. Lately, Inuzuka always helps when something happens. Teria then understands what Inuzuka means by “With all the stuff he has to deal with lately”. Inuzuka has pushed too far for other's sake, but he is also trying to support himself as well. If this keeps up, then Inuzuka wouldn’t last long. Teria then decided to take everything in his place. She was afraid at first but wanted to support her Servant. She put all the effort she could to help him. The three days have passed in a flash. The exam has begun. When the results were out, Inuzuka has gotten in fifth place! Every student was shocked, even Inuzuka himself. Teria went to congratulate him since he works so hard. But Inuzuka said it wasn’t him alone. He knows that she been helping him with his chores with the students, so he could concentrate on studying. He thanks Teria and is glad that she is his master. Teria is blessed that her Servant is grateful to her.
Romio, Teria and a Certain Conclusion
~ Main article: Chapter 97 ~
Teria went to submit the budget reports to the new Head Prefect, Inuzuka. She is suddenly acting like a big sister, which makes Inuzuka uncomfortable. Later she went to find Inuzuka who appears in her room. She wants him to help her to run some errands at Dahlia Street. Having no choice, Inuzuka followed Teria to Dahlia Town, and Terria is still making a big sister's personality. She saw some crepe which she wants to buy but has to resist since she believes it’s for children. Inuzuka said he wanted one, which makes Teria teasing him by calling him a child, which annoys the Head Prefect. They kept walking around the town to buy some equipment for tomorrow’s ceremony. Teria keeps messing things up but still tries to be a big sister. Inuzuka told her to stop. She is just forcing herself. She should just return to the old Teria before, but she said the old Teria isn’t good enough. She then ran away, but she didn’t notice she was heading towards a dog park in which the dogs went jump on her, wanting to play. Inuzuka tried to save her, but she said not to. She will be a mature lady soon and she wants to prove it to him that she could. However, she then passed out after saying that.
After Inuzuka saves her, the two sat on a bench talking about her situation. Inuzuka asks why she is acting like this. She has to tell him this someday, so she tells him now. After she steps down being a Prefect, she will leave Dahlia Academy. Inuzuka was shocked that she will be going back to Touwa, though it will only be three months which makes Inuzuka a fool of himself. She received an offer to enroll in a course at the engineering school of Touwa University. If it goes well, she will get a recommendation. So if she keeps being so careless, then that would make Inuzuka worry. So she wants to show him that she could be a big sister. Inuzuka calls her a dunce. Since he already knows her strengths and how kind she is. He is the one who looked up to her. Teria remembers all the help she received from him in the past. She will never achieve anything if it wasn’t for her sister. But after seeing he want to change herself. She wants to be a person who's been looked up to. The reason why she could chase her dreams and take up the challenge was because of him. She tied her hair buns, smiled, and told Inuzuka that she is grateful to meet him.
- Her first name, Teria, is based on the word Terrier when spelled or spoken in Japanese.