Not sure too much about the rules concerning crossover cosplay, but they are dressed up as Supergirl and Batman respectively, so I'll put the series of the characters they're cosplaying as in the tags anyway.

Comic made by Frezezyk

It's kind of a shame that it seems like Rivals of Aether 2 doesn't have Halloween Skins for everyone, but I just kinda had to make this joke ever since I watched Maypul's character reveal trailer a year ago: https://www.youtube.com/watch?v=yKUH3zTNWMk&t=5s

She really does sound like a female Batman, not Batgirl nor Batwoman who sound more normal than him, but a genderbent Batman who still talks all gravely even after changing genders. Maypul even uses multiple tools like Batman too. Here's hoping next year of the game that she might have a Batman-like outfit along with the rest of the characters like Fleet.

Fleet is wearing the True Supergirl outfit from the My Adventures With Superman as I think this costume fits her the most considering how much she wants to be seen as a heroine and do hero things.

I bet if she meets Maypul due to both of them have a strong sense of Justice, I'd bit she might be a bit intimidated by Maypul's Batman voice a bit. But it wouldn't much of a funny comic if she didn't overreact just a little bit to somehow fly away for real. ^^;

Oh yeah, this is the first time Frezezkyz is doing simple style, I think. What do you think it looks so far?