Zeno Zoldyck

Zeno Zoldyck Zeno Zorudikku is Killuas grandfather and Silvas father. A witty old man his advancing age has not dampened his quick thinking and speed in battle. Zeno wears alternating signs on his garb that say either A Kill A Day or Never Retire. He appears to be on good terms with the Hunter Committees Chairman Netero who hired Zeno to assault Ming Joliks palace in East Gorteau in order to catch the chimera ant King off guard. Zeno favors Killua more than his other grandchildren most likely because Killua is the heir of the family. Source: HunterXHunter.wikia