Carrol Martell♂

Carrol is a half-angel priest who runs an orphanage for half-angel children. He is Ruby's half-brother, the son of an angel mother and Ruby's demon father. He holds a grudge against Ruby since Ruby's father left him and his mother, and Ruby got to experience a normal childhood that he never had being a half-angel, which eventually caused him to lash out against Ruby and give him the scar across his chest. He is very quiet and reserved, but has a short-temper hidden beneath. He either becomes an ally to Alex or Platina, and whichever side he chooses, Ruby will be on the opposite side.

[From Boys' Love Games Headquarters]