This is how making a cover and Ryan helps Marrinette goes in Guitar Villain (CTaRAoMToLaCN).
[in Marinette's room]
Rikki: So you think it can be great?
Ryan F-Freeman: Yeah. You think of some ideas, Marinette?
[Cody puts his hand then his eyes turn white. Flashback to
Ryan F-Freeman: [in Queen La’s Voice] Ah. Now, that is an improvement, Matau. Now, kneel before your Queen! Queen La! Queen of Opar!
Matau T. Monkey: Master Ryan? Is that La in you?
Ryan F-Freeman: [in Queen La's voice] Yes. I would finish what I left off when I am in the body of Jane.
[Flashback ends and his eyes turn to normal]
Cody Fairbrother: Whoa. Brother? Did you said that you are a queen?
Ryan F-Freeman: Well. It was Queen La when she is in control of my body.
Rikki: Really? That is a bit like Mal when he controls the body of a boy named Mike.