Six is Kin, a deeply rare Fey-Darkness crossover. She is a trained assassin, one of the Darkling Twelve who serve under the See Kanon. Influential in Notte’s life, she taught Name meaning: Night (Italian – he picked that one) Other names: Naktam; Night-child; Nox Aeterna; the Blood King; Lord of the Night Whispers; and of course, just Night. Notte by... More self-defense and assassination during his time in the city of Az’Kabek.
Also, incidentally, Six is based off a wonderful reader: Sixelona.