One of Makoto's work colleagues. Not married. Envies Makoto because of the beautiful wife he has. As well as Okahama sometimes acts like a pervert. Is not really attentive to his sex partners (which is discovered during the girls' talk about the worst types of men).
One of Makoto's work colleagues. Not married. Has many fantasies about women and often says vulgar things making Makoto blush. Okahama himself thought he was good at sex until girl colleagues started to discuss the types of men they hated most. Then it revealed that he had a lot of problems, f.e. thought only about himself.
Makoto's father. A 52-year-old company officer. He is overly sensitive about his sex life, and far too protective of his youngest child, Jun. (source: http://en.wikipedia.org/wiki/Futari_Ecchi)
Makoto's elder brother. A 29-year-old lawyer. He is very nosy and frequently pesters Makoto about his sex life and fancies himself as Makoto's tutor on the topic of pleasuring women. In order to appease his own sex drive, he frequently visits brothels. Is used to speak in an extremely loud voice which (along with the topic Akira usually covers) makes everyone embarrassed.
Ogiue is a blunt, self-hating fujoshi and amateur artist whose inner turmoil is the focus of much of the second half of Genshiken. Ogiue hails from the Tohoku region of Japan in the northeast, and as such frequently tries to hide her accent while she attends college in the Tokyo area. When put under pressure though her accent tends to slip through. Her eyesight is incredibly bad, and requires the use of contact lenses or glasses. Ogiue is a fan of yaoi and boys' love, and her taste in doujinshi stems from a preference for shounen series. Among the series she likes are Scram Dunk (Slam Dunk), Haregan (Fullmetal Alchemist), Reass Mood (Code Geass), and Wotaru (Wataru). In junior high, at the request of her friend Nakajima, Ogiue drew a yaoi d�jinshi of a boy named Makita, whom she had been secretly dating. Makita found the d�jinshi and soon after transferred to a different school. This incident is the source of Ogiue's trauma and self-hatred, and it continues to haunt her until she begins to date Sasahara, who is much more understanding of her yaoi fantasies and love of drawing. Ogiue eventually obtains a publishing deal with Monthly Afternoon, the very magazine in which Genshiken was published. In the relaunch of the manga, Ogiue managed to draw in three new members to Genshiken (not counting Sue) thanks to her large artwork demonstration. She has hired the four first-year club members to be her assistants for her professional manga work. (Source: Wikipedia)
Macha is the cat character that appears in .hack//SIGN and other .hack series. Although she appears to be a typical hacker or Vagrant AI, she is actually an alternate form of the Sixth Phase Macha the Temptress. She lures Tsukasa to a secret area, where Morganna can then manipulate him. After the events of SIGN she takes on the form Mia who resembles an older version of herself dressed as a warrior, and goes on adventures with Elk to find aromatic grass because Elk resembles the boy in her dreams(Tsukasa) who gave her aromatic grass in the first place. In .Hack//GU Endrance(an adult Elk) has the power to summon her true form into battle.