Portmanteau Couple Name: Let's go through the list... Jobi, Crethan, Tora, Cake, Mo, and even tripled in Crethikh... and somehow, the infamous Kraken.
Psycho for Hire: The entire reason Creed is with the group in the first place. A shady sect of the government called him up and wanted to employ him with the task of tracking down the so-called Gifteds, capturing them, and bringing them back (the self-appointed leader of the sect was fully aware of Creed's "work", which is why they wanted him). Creed obliged, but only on the terms that he'd be able to study the group at his own leisure and go by his own rules. Basically he was telling the sect that he would be doing the task for himself and have nothing to do with them. Outraged, they intended to try and use force to make him change his mind and go along with their original plans. Creed ended up decapitating the agents and shooting their general in the head.
Pulling Themselves Together: As Mask seems to be literally falling apart, he's constantly having to sew limbs, pieces of flesh, and all that good stuff back onto his body. Usually with the help of Jojo.
Retired Monster: Percy. In all honesty, he's a sociopath. Feelings for others are either shallow or artificial, and he only cares about personal gain. When he was in his twenties and thirties, he was quite the womanizer... for their money. Greedy and obsessive over the personal image that came with his increasing wealth, he would go after the upper-class women... and they would swoon over him. Once he finished extracting their goods through various means, he would dispose of them. Let's not discuss how.
Scars Are Forever: There's a reason why Snake always wears turtlenecks. Pre-Cannon, Snake was a member of a group of assassins called Apocrita. He was one of two men trained into the system from a young age; the other man was Aaron. Snake adored his mentor like a father, and the mentor was also the leader of the squadron. But as the leader was growing old, there wasn't a named successor- it was known to be either Snake or Aaron. Aaron tricked Snake into shooting the leader down, Snake not knowing the identity of his target. Aaron framed Snake for shooting down the leader to claim leadership for himself, and personally tortured the man for his deeds with acid. Snake managed to escape, albeit emotionally and physically scarred. He turned himself in to the police as it seemed safer behind bars than out in the open for his ex-team to hunt him down.
Shoot the Dog: Because killing six was what it took to keep Matt alive during the quarantine, Gabi did what she had to. If you want to get technical, it was 4 direct kills and 2 indirect. She shot her cousin when he was possibly turning Feral after getting bitten, and shot three soldiers during their escape. Her aunt killed herself soon after her son's death, and her mother died due to Gabi's inability to protect both her and Matt because the gun was out of bullets from killing the soldiers.
Those Two Bad Guys: Percy and Snake. Between Snake's constant Blood Lust and Percy's calm, deadpan nature, there is always a sense of clashing contrast between the two. Somehow, they get along, as Opposites Attract... and they do muddle the peace in the rest of the group's plans.
Well-Intentioned Extremist: Yup. There's Creed, again. Recently, though, he's been gradually developing into a Tragic Villain, having lost sight of what his original goal was and if there even was one to begin with.