I cant get Mal0 as an enemy I just keep getting Kar even after like 6 runs, is there a something wrong with my game or is it just luck?
Customization tab on the left edge of your screen, where the shop and inventory tabs are. You can change between Kar and Mal0 at will, and even pick different outfits (only 3 for Kar and 2 for Mal0 currently) and use sliders to adjust a couple of their bodily characteristics to match your, er, aesthetic preferences, we'll say.