For starters, having two characters having powers originated from Aprico’s tests seems like a little much, especially given how close they resemble one another. Maybe expand a little more on the Venom side and less on the spider side? Maybe her power from The Boom wasn’t discovered until she got hit with a stray bullet from a stolen prototype weapon? 

As for skills and unsuited skills, anything not science related? She seems pretty athletic, so maybe dive deeper down that route?

I don’t want to tell you how to make your character so they’ll fit in, otherwise I’d just write them myself, but I want to help you get an idea to help make them stand out among other similar characters