Takemichi is the head of the elite guard of The Crazy Diamonds, Mondo Owada's biker gang. He was the closest person to Mondo, which is why he became a Captive for Danganronpa: Trigger Happy Havoc first motive.
Takemichi is a short teenage boy with spiky hair that extends out in the front. He wears a black student uniform (which the Warriors of Hope assume is magical). He is described as being very good-looking by Hiroko Hagakure.
Takemichi is a rather stubborn, proud teenager with "a head as hard as metal". He is very inflexible, however he doesn't hide it, like most others would. The artbook also notes he's “highly intelligent and coolheaded”. 
Though his physique isn't that great, his fighting spirit makes him rather strong.
Though it is said he is not interested in "female Demons", many girls seem to like him and he even has a fan club.
Prior to The Tragedy
Takemichi was once the head of the elite guard of the Crazy Diamonds. He was entirely faithful to both Owada Siblings, and he, apparently, became the closest person to Mondo after his brother died.
After Mondo left to Hope's Peak Academy, Takemichi stayed with the gang. It is implied that Mondo made him the interim leader of the gang while he was at the academy.
During The Tragedy
Later, Takemichi was captured by the Ultimate Despair and became a Captive for Monokuma's first motive in the Class 78's Killing School Life. He was apparently enclosed in an apartment just like the other Captives.
He was later freed, only to become one of the people targeted by the Warriors of Hope.
After becoming a Target, Takemichi hid near the Towa Library. When Komaru Naegi and Toko Fukawa give his entry to Hiroko, she states she'll send men to save him, commenting how she would save him herself if she were ten years younger.
It's implied he is rescued along with the other Captives by the game's end.
- Gang Member:
Takemichi was in Mondo's biker gang, being the head of the elite guard of the Crazy Diamonds. He was very close with Mondo, confirmed by the fact that he became a Captive. In the official artwork, the illustrator comments that Takemichi was designed to be Mondo's Junior. He was also Mondo's bodyguard. 
- Takemichi, or 竹道 means "bamboo path", and Yukimaru, or 雪丸 means "circle of snow". His full name could be interpreted as "a bamboo path in a circle of snow".
- It is stated that he does not like "female Demons", which could be hinting at the fact that Takemichi is gay.
- As noted in the artbook, Takemichi is in charge of carrying The Crazy Diamonds' Flag.