Kikyo Zoldyck

Kikyō Zoldyck (キキョウ＝ゾルディック Kikyō Zorudikku) is Killua's mother. She was injured attempting to prevent Killua from running away from home to take the Hunter Exam, although she is proud of Killua for doing so. She is the maternal figure of the Zoldyck family and is an assassin herself. She seems to be slightly paranoid and is cautious of Killua's friends. Kikyō is looking forward in Killua to excel in assassination and anticipate that one day, he will continue on with the family business. According to Illumi, Killua is her favorite son.

Kikyō is 170 centimeters tall and dresses in Victorian-era clothing. Her face is covered in bandages (most likely from Killua's attack on her) and has an electronic visor covering her eyes. The visor is capable of being used as a communications device, although what other purpose it suits is unknown. But when Kikyō cries, the visor shows static similar to a television.