Huian (惠安, Obliging and Quiet) is the older sister of Ling and an aspiring young Quincy. Having spent the majority of their lives being carted from foster home to foster home, Huian and Ling found themselves crossing the paths of Raphael and Kusagi Kōta. Informing them of their "power", Kusagi offered them sanctuary alongside him and Raphael. Seeking to free her sister from the dark burdens they have been forced to endure for their childhood, Huian accepted the offer.