Leorio doesn't have any siblings. Gon is Killua's maternal cousin brother. Ymir is Kurapika's sister. Leorio is the husband of Illumi. Illumi is Gon's mother. Kurapika and killua are siblings. Zeno is killua's mother. How is Leorio related to Zeno?
1
Sister in law
2
Father
3
Brother in law
4
Brother