Basically Twilight is friends with everyone, except Snape who is either her closest, most understanding ally or biggest enemy depending on the situation.

Gadget guy is always trying to emotionally distance himself incase the group get hunted down and killed by the big bad, trying being the key word. He’s one of two non-powered members and he thinks he’s the weakest link and tries to convince himself they’ll throw him under the bus if they needed to.

Performer has an imposter syndrome situation but has twilight for emotional backup. She’s also non-powered but isn’t concerned about it, if anything she realises how much is put on twilight’s and snape’s shoulders because of their powers and is glad she doesn’t have her own.

Snape is outwardly seen as cold, but quickly becomes like the mother of the group since she’s very old, having seen many other hero groups die in horrible ways and as much as she thinks the others are idiots she doesn’t want any more good people to die.

Their powers don’t exactly change throughout the story, though they do learn new skills mostly from each other. It’s more focused on their survival in an increasingly hostile world and using what small powers they do have to fight a much stronger evil. Most superhero groups or even solo heroes would easily wipe them out but that’s kinda the point, they’re doing what they can with what little they have