Kuroi, Tatsuki

黒井達樹

Tatsuki, known as Tatsukichi to Ran, is a wild yet kind student at Machida West High School. He refers to himself as "the parapara king of Machida" (also called "Machida Black," since "kuro" in his surname means "black"). In the manga, he is also referred to as Blackwell, which is the literal translation of his surname. He is frequently nicknamed "Monkey Boy" because his personality closely resembles that of a monkey.
He becomes Ran's boyfriend, although she studiously avoids anything remotely approaching intimacy. Because of this, Tatsuki sometimes feels he should not be Ran's boyfriend and often feels that Ran does not show that she is his girlfriend. He likes to use English words and phrases in his conversations. Sometimes he says a phrase in English and then says the same phrase in Japanese, or he says a phrase with the first part in Japanese and the second part in English, and then repeats the phrase, switching what is in Japanese and what is in English (example: "Black nichiyoubi", "Black Sunday", and then "Kuroi Sunday"). He also likes to call Yuya "brother" in English.