Okay, X! Here you go!

Dorm #1

Blue ♀️

Yellow

Crystal

Platinum

Dorm #2

Green ♂️

Red

Diamond

Pearl

Dorm #3

Sapphire

White

Whitley

Y

Dorm #4

Gold

Silver

Ruby

Matthew

Dorm #5

Black 

Emerald

X

Isaac

Matthew is a rich know-it-all with a good life, and is quite snobby.

Isaac is a positive person, laughs a lot but is never really loud (so not Black). He's a stereotypical "normal" guy.

Luna out!

~Luna Raven Hibeki