The unnamed principal of Sainan High is well-known throughout campus as a pervert. He will impulsively enroll girls into the school body, so as to ogle and grope them without hindrance, though this is not restricted to Sainan High, but also occurs in public, as well.
Touka is an Evenkruga, warriors who fight for justice. She fights using a longsword (katana). Her increased agility and swordsmanship make her a deadly warrior. She has a weakness for cute animals and is a lightweight when it comes to alcohol and hot baths, over-heating and passing out easily if subjected to either. After being Hakuoro's enemy for a while, she pledges fealty to him in order to redeem herself for the injustices, taking the role of Hakuoro's bodyguard.
A perverted high school student. He hates his father believing him to be the reason his mother died. He wields a power known as "blood pointer" which allows him to drain "element" from the people around him through his mouth. He has periodically used this ability throughout the series without knowing it. After the battle with the Venus unit he has begun to undergo training to understand this power and use it. He is the childhood friend of Haruko Ayama. His maken is known as "Overblow", which lets him cause his opponent's maken to gain incredible power and overflow with element causing it to go out of control and force the user to not be able to use it. However, when his opponent is able to contain the overflow of element or has perfect control over his maken, it would only provide his opponent greater power or even make the maken evolve into something greater. (Source: Wikipedia)
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)
Member of Comet Blasters.
Birthday: June 18 Blood type: AB Ana is an eleven-year-old girl who originally came from Cornwall, England, five years before the series, but seems to have forgotten how to speak English. She first pretends that she speaks only English, but it is not long before she is discovered by Matsuri while speaking very polite Japanese. Matsuri tries to help her re-learn English. Ana is often teased by Miu because of her name, Ana Coppola, which can be written in kanji to mean "hole", "bone", and "cave" (穴骨洞, "hole", "bone", and "cave"?). Miu nicknamed her "Coppola-chan", much to her grief. Ana's "proper Japanese" personality is reflected by her very traditionally feminine and polite speaking style.
Birthday: October 17 Blood type: A Nobue is the eldest main character. She is Chika's older sister and usually has final authority on all matters. She often tries to "borrow" money from Chika to buy cigarettes. Nobue is perpetually searching for a part-time job to earn money for more cigarettes to calm her nicotine addiction. The story suggests that Nobue derives some kind of sensual pleasure from watching the girls do cute things. In this respect, Nobue appears to appreciate the moe aesthetic. It is seen during the anime that Nobue prefers Matsuri and Ana over Chika and Miu. The Nobue character changed from the manga to the anime. In the manga, she is a sixteen-year-old high school freshman, while in the anime she is a twenty-year-old junior-college student. Her age is presumably changed because of her smoking and drinking habit, both becoming legal in Japan at age twenty. Although in the first episode of the anime she introduces herself as a sixteen-year-old, this was intended to be a joke as she quickly stated that she was twenty. She tends to act somewhat less mature in her manga incarnation, doing things such as tricking Matsuri into thinking that Miu is dead. Her appearance changes radically in the early stages of the manga, especially her hair, which goes from blond to dark brown (and is black in the anime).