Kohaku Oukawa/Family

Overview
Kohaku is part of the Oukawa family, a branch family of the Suou family. This makes him distant cousins with Tsukasa Suou. He describes this as being an "old-fashioned family lineage" and his family has a long history. He lived with his parents and an unspecified amount of multiple older sisters until he moved to the city. He seems to have had a difficult relationship with his family and greatly enjoys the freedom he has now that he's no longer living with them.

Parents
Kohaku states that he worked very hard to leave his parents' house, and he thinks that they would never let him out again if he came back.

Trivia

 * Kohaku states that they "get dispatched to the scene" more often than he does, and they seem to have more experience with the things the Oukawa family has been involved with than he does.
 * Kohaku's sisters are quite protective of him, to the point that he considers it annoying and excessive, but he's also grateful that they're willing to listen to him talk about anything.
 * In Secret Service, we learn that one of his sisters looks enough like him to pass for his twin, as he requested for her to cover for him in Osaka in Crazy:B so that he could go to Shikoku to find out what Madara was up to.