So this is Ray doing a harmonic guitar piece with Mousse, another character from the Ranma manga.

So the idea behind this pic is like this:
Ray began to be frustrated with the idea he's the only guitarist
so he got in search after a second guitarist, apperantly Shampoo heard about this and suggested Mousse.
Ray arranged an audition with him and Mousse instantly got into The Missing Half.

About my take on Mousse:
He began playing at an early age to keep himself occupied.
His guitar skills soon evolved into a great ability.
He is partly based on DragonForce guitarist Herman Li.

His main guitars are an Ibanez S prestige series and a Gibson Les Paul Custom in alpine white(as seen in the picture), both loaded with Dimarzio Evo pickups.