KissxSis: Riko Suminoe

Riko is the youngest of the twins. She is also the head of disciplinary committee, where she uses a bokken/shinai to punish the students, and she has a stricter personality. While it is shown that both she and Ako have a lust feeling her Keita, Riko is shown to be lustier, as she once sneaked into Keita's room and slept with him (and by that i mean normal sleep and not that kind of sleep)

Kiss x Sis: Ako Suminoe

Ako is the oldest of the twins. She is also the smartest of the two as she good grades in her studies. While it is shown that both she and Riko has a lust feeling her Keita, Ako's is shown to be least as she is shy. a known characteristics about Ako is that she has the habit of kissing Keita and making excuess by telling him those are either "welcome home kiss,” the “make-up kiss,” the “study well kiss” and so on.

Sacred Seven: Ruri Aiba

Another main character of Sacred Seven. She is the daughter of a billionare noble family who were killed by a Darkstone. She created Aiba Foundation to combat against the Darkstones. She is a Lightstone that has the ability to turn a crystal into a Lightstone and insert it into Alma to control his true powers. She became chairman of Alma's school (where she heavily renovated the school) to keep in contact with Alma. She has a twin sister named Aoi who also survived the Darkstone aftermath, but was crystallized. Her whole foundation is occupied with all female maids.

Kono Bijutsubu ni wa Mondai ga Aru!: Mizuki Usami

She is the only serious member of the art club. She tries her best to help her fellow art club members with their work.

While being serious, she has also shown that she can easily be aggressive when other people tease or irritate her. In the President's case, she will use her baseball bat to hit him when he takes pictures of her and accidentally drops her painting on the spilled paint.