Celesgami

Celesgami is a het ship between Byakuya Togami and Celestia Ludenberg from the Danganronpa fandom.

Fanon
Although Byakuya and Celestia haven't talked much and they canonically haven't had any romantic relationship, this ship became sort of popular on the Danganronpa fandom.

Part of the reason why the ship became popular is Danganronpa Abridged Thing series. In this version, Byakuya and Celestia agreed several times about their current situation being a game where everyone's enemies. This led to Makoto Naegi telling them to get a room in Episode 4, Aoi Asahina outright saying she ships them, and Toko Fukawa being against the ship for obvious reasons.

Another part of this ship becoming popular is the fact that one of Celestia's "butlers-slash-bodyguards" in, the one kissing her foot, bears a strong resemblance to Byakuya.