You get to pick between two options for everyone, except for leorio because I couldn't really find anything but yay:)
Hisoka: he wanted your room to be cute:)
Gon: he basically decorated your room based off of what he liked but you still liked it<3
Killua: he wanted your room to be a fun place to hang out at
Illumi: didn't know what you liked, he only knew you liked the color black so-
Kurapika: he remembers when you said you liked flowers and the color yellow
Leorio:
Machi: didn't know what she was doing but she did it anyways 😀💅
Shalnark: you guys both have a indie vibe so it was easy to decorate your room
Feitan: you're both emo and like black so-
Chrollo: he remembered your favorite colors, your vibe, and what you didn't like so he could decorate your room