So a calculating villain, a dualistic fighter who goes all in, a rogue and a trap/item user, from what I understand? Seems like we've got a pretty balanced party, I like it! Spinel is a pretty straightforward sniper. She's about as fragile as Evenkite and not quite as, but still reasonably, nimble. Her whole thing is using her speed and her invisibility power to find a good hiding spot and wait until she can get a decent shot. She basically sucks up close, her bow wasn't made for close-range combat, but I suppose if she was desperate she could pull a Daryl Dixon and try to whack someone with it. That would be a last resort though, since she isn't exactly going to do a lot of damage like that and it would probably poof her crossbow.