Problem is, we already have an Evilswarm user character in the game : Aigami, aside from Cubics he's being given Evilswarm cards to contrast with Sera having Constellar for whatever reason
I still don't get why they chose Aigami for Evilswarms. Something tells me the thought process went "Hmm, he was beaten in the movie by Mahad, and we gave his sister Constellars because they went with her Unknown Duelist design... Oh! I got it! We'll give him a dark version of Sera's deck! It's so original!" On a side note, Number 96 also plays Evilswarms in Legacy of the Duelist: Link Evolution.