Wii U or not, everyone knows the characters now.
In Danger:
Mario
Peach
Rosalina
Metal Mario
Toad
Baby Mario
Baby Luigi
Baby Peach
Baby Rosalina
Pink Gold Peach
Bowser
Donkey Kong
Wario
Roy
Lemmy
Larry
Wendy
Morton
Mii
Safe:
Yoshi
Iggy
Lakitu
Ludwig
Shy Guy
Luigi
Waluigi
Daisy
Toadette
Koopa Troopa
Baby Daisy
Out: