Motohama is the other best friend of Issei who made up the "Perverted Trio". Motohama has the ability to calculate a female's body measurements just by looking, which earned him nicknames such as "Perverted Glasses" (エãƒãƒ¡ã‚¬ãƒ� Ero-megane) and "Three Sizes Scouter" (スリーサイズスカウター SurÄ« Saizu SukautÄ�). Like Matsuda, he constantly spreads bad rumors about Issei out of jealousy of his relationship with the Occult Research Club. He does not know that Issei and the Occult Research Club members are Devils. Motohama is known to have better results than both Issei and Matsuda. (Source: High School DxD Wikia)
Status: Prima Birth date and place: Aqua, July 29 Age: 20 Height: 168 cm Blood type: O Akira is one of Neo Venezia's three Water Fairies, and is Aika's supervisor with the Himeya company. She is nicknamed the Demon Instructor for her strict training regimen as well as her loud and brusque personality. She is particularly harsh with Aika, in spite of the fact that the girl is her employers' heir, though she does so since she honestly thinks that there is potential in her. As such, she is the only Himeya employee who does not fawn on Aika, though even the latter admits that it is only due to Akira's strictness (and honesty) that she has been able to become a good undine. As a prima undine, she is known as "Crimson Rose" (真紅�薔薇). Akira is famous for her conversational skills as well as her intimate knowledge of the sights to be seen in Neo Venezia. She has a lot of admirers among her customers, though surprisingly enough these are more female than male (which seems to bother her a little, as she considers herself very feminine). Akira and Alicia's relationship mirrors Akari and Aika's, though Alicia is far more teasing when Akira is around. This isn't that much of a surprise, as Akira and Alicia are childhood friends. However, Akira is still galled that Alicia became a Prima earlier than her, despite the fact that Alicia initially became an undine to tag along with her. (Source: Wikipedia)
Akari's first customer as a Single. He is a tall, impatient young man who calls Akari "Pigtails" (momiko) to tease her. He works as an apprentice Salamander, someone who helps maintain Aqua's climate in the floating buildings that tethered overhead. Although drawn like a typical bishonen, his constant scowl combined with a loose-fitting robe usually cover up his more "attractive" features, which he rarely displays. Akatsuki has an older brother who takes great pleasure giving him a hard time. He's also Woody's childhood friend, and also knows Al the gnome, and is occasionally seen in the company of Woody and sometimes Al. (The latter much to Aika's consternation, since she doesn't like Akatsuki much, but loves Al.) Akatsuki has a rather heavy crush on Alicia, often calling the Aria company phone just to hear her away voice message. He's not adverse to spending time with Akari either if the mood strikes him, or demand of her to help him with various things, like carrying the many roses he bought for the Boccolo festival. Naturally, he took rather badly to Alicia's sudden marriage at the end of the animated series. In the same (final) episode however, he musters enough courage to invite Akari for a visit to his workplace when she would be free, which depicts he may have moved his affections over to Akari.
The nurse who take care of Haruka when she in the hospital. She's a good person and realize the gap between Haruka and Takayuki. She once supported Takayuki when they coincidentally met at the street.
Although being friends with Takayuki, Haruka and Mitsuki in high school, he drifts off from the group after graduation. However, he becomes an important character towards the end of the series. He sometimes presents a counter-balance to the drama of the rest of the characters, as his relationship with his girlfriend (who remains off-screen) seems to be going well. (Source: Wikipedia)
A member of the Rising Star orchestra.