Primary

• Biscuit Krueger Teacher of Gon Freecss
• Biscuit Krueger Teacher of Killua Zoldyck

Extended

• Gon Freecss Foster son of Mito Freecss
• Gon Freecss Son of Ging Freecss
• Gon Freecss Friend of Leorio Paladinight
• Gon Freecss Friend of Kurapika
• Gon Freecss Best friend of Killua Zoldyck
• Gon Freecss Nephew of Mito Freecss
• Killua Zoldyck Son of Silva Zoldyck
• Killua Zoldyck Younger Brother of Illumi Zoldyck
• Killua Zoldyck Best friend of Gon Freecss
• Killua Zoldyck Friend of Leorio Paladinight
• Killua Zoldyck Friend of Kurapika
• Killua Zoldyck Older Brother of Kalluto Zoldyck