Teruya is a lighthearted boy who is gifted in management and business, and even aspires to be the next manager of the Otori Mart. He has a positive yet childish demeanor, and is prone to not taking things seriously. Perhaps due to his gift in management Teruya has a strong memory and his analytical skills he can remember the items stored in storage and the gift shop, as well as the exact placement of these same items.

Teruya speaks in a strange accent, as he has traveled all around the country and picked up different dialects. It is implied his dialect his fake, and is only used to make himself stand out more. When he gets nervous, however, he uses standard language instead. He also has a weird taste when it comes to fashion, but strangely enough, it can become a major trend thanks to his talent.