He is very perverted in his behavior and is well known for it. However, he is loyal to his friends and is often seen taking part in their antics.
He shares his comrades dislike for the White Cats, even participating in kidnapping Juliet Persia. However, he has acknowledged the attractiveness of Persia and Chartreux Westia and is amused by their interactions with Romio Inuzuka.
- When his name when broken down and translated to English it would become "Old Sheep English". This may be a reference to Old English Sheepdog. Incidentally, Eigo resemble the dog breed with fur/hair covering the eyes.