Lala is a chuuni, not Death Incarnate. I can't help but think Deadpool would find her somewhat annoying. And possibly help her stop being a chuuni, mostly with fourth-wall-breaking jokes and pure unfiltered sass.
The mon squad really desrves more quality time with the protagonists, not neccesarily as romantic rivals but just... they all really need a hug, I mean Manako's just so concerned with her eye, Tionisha has her size (speaking of I'd like to see her show up randomly with clothes from time to time), And while she doesn't bring it up much I think Zombina has some problems with being undead.