Apple is Kin. Influential in Notte’s life and one of Horse’s rescues, she helped teach Notte during his time in the city of Az’Kabek.
Her primary role was actually to teach Notte how to blend in: how to observe and follow local cultural protocols, how to prepare with clothing, makeup, or jewelry or weapons, and insinuate himself with smooth perfection.
She taught him how to be a gentleman.
Incidentally, Apple is dedicated to a wonderful reader: RainbowCrisp. Also also incidentally, her natural pigmentation tends toward pink. Don’t blame me. The character demanded it. (And please don’t kill me, Kelli!)