Silva
Hunter × Hunter canon · 1 cited sources
Silva Zoldyck is Killua's father and was raised strictly as an assassin. He holds a direct conversation with Killua in which he states that Killua is his son above all else and advises him to live freely. Silva offers Killua the option to return home when he wishes and declares that Killua is free after their talk. 1
Manga sources
1 citedArticle editors
Credited after a moderator accepts their contribution.