Canary

A servant to the Zoldyck family. She believes their difference in status means they will never be close. Unbeknownst to her, Killua regards her as a dear friend. She is initially introduced as a ruthless guardian who does not hesitate to attack trespassers, but, as noted by Gon, she is not as heartless as she pretends to be, and just for a fraction of a second, her eyes convey gentleness or concern, although she tries to suppress it.