The monsters except, they're actually "monsters"
Andrew- pretty much everything regarding the mind... Telepathy, psychokinesis and his favourite Pyrokinesis.
Neil- definitely speed, physically and mentally, mans is fast as fuck Boi.
Aaron- super senses. All the 5 senses are heightened. Also has great intuition.
Nicky- illusion projector. Can manipulate his environment but also his own appearance.
Kevin- self healing but the healing process would be impacted by mental response when receiving the wound.
Trauma impacts the function of the brain so I think they would develop these powers based on their traumas.
I think Andrews makes sense, regarding his Eidetic memory. But regarding his trauma, I think he'd develop these powers because he would want to know peoples intentions and Pyrokinesis would just be developed as a self defence mechanism.
Neil's is obvious. He was on the run, he needed to be fast, it's basically a power developed for survival. It has many uses though, so we all know he's flighty and he checks for exits so also having mental speed would allow for quick plans... it also allows for quick comebacks...
Aaron's power is also kind of obvious. Having heightened senses would allow him to avoid danger (Aka T*lda) but also his intuition would allow him to sense potential threats in people.
Nicky's may be less obvious but Nicky is a people pleaser. I think he'd definitely use his illusionist powers as a self soothing technique. He'd probably create the illusion of a comforting and safe home for himself. But I think he'd also want to satiate his parents and make himself appear how they want him to be.
Kevin would definitely have healing powers but I think they'd be limited. He'd only be able to heal himself but as we all know, Kevin definitely has a few mental blocks and I think that would definitely impact his power. So he'd only be able to heal physical wounds and that pace they heal would definitely be impacted by his mental state. So if he scuffed his knee during practice, it'd instantly heal, the wound has no psychological impact but with a wound such as his hand, due to the mental trauma when receiving the wound, the healing process would be much slower.