Coulehueyou (whose name means "sunstone" in Kalinago; also known historically as Carib) is a native Caribbean boyez (shaman) and adventurer as well as Crevan's occasional ally.
I also want to make clear that while she is very much the Krystal to (the gay or heavily bi) Crevan's Fox McCloud, she is not part of his crew, does not see or meet with him regularly; much being in a romantic relationship.
