Have you thought much about what animals the scientists would be? Both in terms of how they'd view themselves and what you think they'd be?
Gonna answer this in two ways: what they'd turn into if they got hit with some kind of instant animal transmogrification ray, and also what kind of animal they'd WANT to turn into if they had the choice.
N. Gin gives me raccoon or american possum vibes. Just a leetle scavenger creacher with leetle hands doing their best. (Would probably prefer to be a cute lil kitty cat)
Cortex is a smol yappy dog with big ego, like a chihuahua or a pomeranian. (Let's be real, Cortex thinks he's hot shit so he'd think he should be a liger or a similarly huge apex predator, and since he's such an animal geek he'd pick an artificial hybrid species)
Brio is some type of reptile or amphibian, I'm picturing either a bearded dragon or a bullfrog. (Honestly I think he'd be fine with that, but may want something bigger like a komodo dragon or a crocodile)
N. Tropy would be some type of annoying strutting bird, like a rooster or a goose. Since he hates animals so much it stands to reason that were he ever to turn into one he'd make that everyone else's problem.(Would NEVER willingly identify as an animal, but if he were pressed to choose he'd pick an insect or arachnid like praying mantis or a large orbweaver species)