The Madarai Brothers

Isshiki Madarai (斑井一式 Madarai Isshiki) is a character featured in Dangan Ronpa/Zero. He has the title Ultimate Bodyguard (超高校級の「ボディーガード」 Chō Kōkō Kyū no “Bodīgādo”). He is portrayed as cautious and vigilant, looking for “revenge” for someone he was supposedly protecting. He is characterized by lizard-like features and a skilled fighting style.

History
Believing that Ryoko Otonashi knows about the thirteen students killed in the incident at Hope's Peak Academy, he chased her down into a shed, where Otonashi got the upper hand and tricked him, until he used the “ace up his sleeve”. He attempted to knock her unconscious and break her arms and legs, but was apprehended and killed by Mukuro Ikusaba. However, Madarai appears twice more, claiming to be immortal. It is finally revealed that there are eight Madarais, octuplet brothers, each with a given name of a number followed by -shiki (Iss here meaning 1), and they are secretly the Ultimate Multiple Birth Siblings.