A character from the novel [[Danganronpa/zero]], titled the Ultimate Neurologist.

He's [[Otonashi Ryouko]]'s doctor and love interest. Matsuda is renowned for abilities on the human brain. He also happens to be aloof and overly rude and dismissive. 

Has [[short hair|short]] [[black hair]] and [[grey eyes]]. He has an [[ahoge]].

[spoiler]He is the childhood friend and boyfriend of [[Enoshima Junko]], having created the identity of Ryoko in order to protect her from others. Eventually, he tries to kill Ryoko after realising Junko was manipulating him and is stabbed to death at the end of the novel.[/spoiler]
松田夜助