The Madarai Brothers

Isshiki Madarai (斑井 一式 Madarai Isshiki) is a character featured in Danganronpa/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.

Appearance
Madarai has long black hair and a long tongue that sticks out of his mouth. 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.

Trivia

 * The name "Madarai" (斑井) could be roughly translated as "mottled well".
 * The name "Isshiki" (一式) is composed of the kanji 一, meaning "one" or "first", and 式, meaning "ceremony" or "rite".
 * Knowing that the given names of all members of the Madarai octuplets are composed of a kanji character representing a number - presumably between one and eight - followed by 式, the names of Isshiki Madarai's identical siblings (at least two of which are known to have made an appearance under their brother's name) could be read as follows: Futasshiki (二式), Misshiki (三式), Yosshiki (四式), Sasshiki (五式), Rosshiki (六式), Shisshiki (七式) and Yasshiki (八式).
 * It should be noted, however, that the readings for the given names of the Madarai siblings as they are written above are not the only possible ways to pronounce their names - as there are multiple possible readings for kanji numerals when they are used in names (nanori) - and so must not be taken as 100% accurate. The readings above were chosen due to using nanori readings that cause the "elongation" of the /sh/ consonant sound of "shiki" (式) - as evident in the name "Isshiki".