Age: 19-23

Birthday: October 25, 1982

Zodiac Sign: Scorpio

Blood Type: O

The second president of Genshiken, Madarame is personally chosen by the first Genshiken president to be his successor, though Madarame shows the most leadership and initiative even before formally appointed as president. 

He is a Gundam fan and arguably the most hardcore otaku out of all of Genshiken. Madarame buys dōjinshi without looking at price tags, something that occasionally leaves him with very little spending money on basic necessities such as food (his sushi of choice is bacon sushi topped with mayonnaise, cheap at 50 yen a piece).

Madarame takes pride in everything that he purchases. The Official Genshiken Data Book's otaku quiz section calls the highest level of otaku "Madarame."

Madarame's loud and adamant support of his own otaku lifestyle initially makes him Saki's nemesis in Genshiken, but as Madarame develops a crush on Saki it heavily influences his interactions with her. However, even after graduating and getting job at Sakura Pipe Repair thanks to his "computer literacy" (i.e. experience with porn games) Madarame never admits his feelings to Saki as he does not want to risk ruining their friendship.

In the relaunch of the manga, Madarame still drops by the Genshiken clubroom for lunch. In order to help the crossdressing Hato be able to come to the clubroom as a girl while attending classes as a male, Madarame agrees to allow Hato use his apartment to change since it is very close to the school.

In the spin-off manga series "Spotted Flower" (unconfirmed if canon), Madarame is finally in a relationship with Saki; they are married (she took his virginity) and Saki is pregnant with their child. Much of the story revolves around their married lives, specifically her pregnancy and his otaku lifestyle affecting their sexual intimacy.