Chasriel

Chasriel is the familyship between Chara and Asriel in the Undertale fandom.

Canon
Asriel's memories of Chara saved him and gave us the Pacifist ending. In the flashback Chara and Asriel had flowers. Asriel carried Chara on a bed of flowers when they died. They both have green and yellow striped shirts.