This is ryuunoske Maxwell (Ryuu) cherry first child depending on your situation yours as well. But in the storyline without your oc (my personal one) he is the child of cherry and a mystery man (she's not a whore I'm just being mysterious lmao). He will make pop ups here and there.

Ryuu is very similar yet opposite of his mother where she is feisty he is calm where she gets easily lit up it takes him a while to get there. She doesn't just sleep with anyone he will sleep with anyone as long as he finds them attractive and they have a decent personality (with conditions of course).

They are very close but not in a weird way. Cherry trained him but he never took it seriously (not in this time line at least) despite having so much potential.

If Cherry where to die before her and akuma were fully combined akuma would then latch himself onto Ryuu for a number of reasons he will not say.
And ryuus transition will be much faster then cherrys

He often gets told he looks just like his mother and he hates it because he's aware.

"If I had a penny for how much people told me that I'd be the richest man in the galaxy"

So yeah that's it just some stuff :)