Theory Level: Possibly unlikely, maybe reading too much into it.
Season 2 Part 2 introduced a new character called Dylan. At first, he seemed like a typical low-tier. However, I've noticed a few things about him over the course of this season:
1) When Dylan, John, Seraphina, Roland, and Evie were getting the Gym set up, all of them were exhausted except for Dylan. Dylan still had tons of energy left. Maybe I overlooked this but Low-tiers don't have as much energy as the higher ranks, right? (I could be mistaken here) - Maybe overthinking this one
2) When the safe house was attacked by Spectre on the mountain trail and Blyke elbows one of the attackers who held Dylan hostage, Dylan ducks without closing his eyes or looking in Blyke's direction. - Probably overthinking this one too.
3) You ever notice that in some shots two strands of Dylan's hair sometimes make it look like he's got devil horns? (For example in Episode 243 the second shot of him when he's looking over at John before hiding his face behind his cards and in Episode 278 when Isen jokes that John and Seraphina went missing)
4) Speaking of his hair, it is quite similar to John's when he was posing as a cripple.
5) Here's a big one. In Episode 284, John asks Dylan to show him how he punches. Dylan punches the wrong way with his thumb tucked in. However in Episode 268, when Dylan asks John if he could show him a few pointers, he's clearly seen punching the right way with his thumb on the outside of his fist. Was Dylan faking how he punches? Plus when John shows him how to punch Dylan gave that punching bag a good wallop.
6) We don't know what his ability is, nor have we seen his eyes glow at any point. True, it could just be there's been no need in the story to show his ability if he is a low-tier. But, what if he's hiding what his ability is, as the moment he activates it and John senses him, whatever he could be hiding would be revealed.
But then again he may just be a low-tier and these are nothing more than theories. What do you all think?