Updated
Chrollo:
His:
-Lucifer
-Mr. Boss Man
Your's:
-angel
-love
Kirapika:
His:
-Kurt
-Baby Boy
Yours:
-Sweetness
-Sunshine
Killua:
His:
-Prince Charming
-Mine
Yours:
-he's too embarrassed
-to call you by any pet names
Gon:
His:
-Hunter
-Frog Boy
Yours:
-Pixy
-Raisin