Takashi Mitsuya/Synopsis

History
Ever since he was a child, he mostly took care of the house chores and looking after his two younger sisters, Luna and Mana, since they only have a mother who was always at work. One day, when he was walking in a playground with his younger sisters, he saw Hakkai Shiba beating up someone. He stopped Hakkai and told him that violence should always be used to protect. The two officially met and Mitsuya invited Hakkai to their house. Since then, Hakkai looked up to Mitsuya as an ideal brother.

On a rare occasion, Mitsuya ran away from home at night and left his two younger sisters alone. During that time, he graffitied a dragon on a wall where he didn't realize that someone was watching him, there he met Ken Ryuguji, Mitsuya ate all of Draken's food but the latter suggested that the dragon graffiti will be his in exchange for the food. Draken then brought Mitsuya to his home. After playing and winning easily in poker with Draken and the girls in the brothel, he said that they were so lucky and he wanted to live there too. One of the girls then lashed out at him suggesting that he go home. Draken told him that, for the girls, it is not a place where you can just stay at. After a few months, they met each other again only to find out that they have similar dragon tattoo. Thus, the Twin Dragons were born.

Mitsuya eventually became close with the other founding members of Toman even before it was formed.

Plot
At Toman's meeting at Musashi Shrine, Takashi sees two Toman members trying to chase away a boy and he realizes he must be Takemichi Hanagaki, and scolds the member for trying to scare the commander's guest. Takashi then takes Takemichi to Manjiro Sano. As the meeting starts and Pah-chin and Peyan pick on Takemichi, Takashi reminds them they were told to drop the Masataka Kiyomizu subject. As Ken Ryuguji stops them, Ken and Takashi explain that Pah-chin's is in a bad mood, because his bud got beaten up and his girlfriend raped by Moebius' leader Nobutaka Osanai and this is the reason for the gathering and conflict with Moebius.