To play as Rafisol hold L and hit random (Hold LB and hit random on controller)
To play as Paprisu hold P and hit random (Hold RB and hit random on controller)

For the secret Arle skin hover Arle and type "3.." including the periods
Hover Arle and hit the left button [X for Xbox] [Y for Nintendo switch] [Square button for PlayStation]

Hit it 10 times when hovering and you will have your secret skin

Hope this helps controller players