I want to talk about not likely of their abilities, but their passives, those are core ability for what it make them either strong, weak or somewhere between.

POPGOES THE WEASEL

Popgoes (apart from being classified as Wildcard) would have OM Amy's passive what would work like her Tarot Cards. Two gifts randomly chosen out of six would determine of his senses, ability cooldowns, stun time, max health, etc. You can re-draw those gifts by clicking that respecting keybind (4).

CANDY 'N CINDY

Cat twins would have one shared ability; SWAP. For the respecting character you're actually playing as (either Candy or Cindy) you get to versions of their movesets. If one the twins got eliminated, you'll spawn as the remaining one in the furthest spawn.

HAMACHI

Not to leak the HTPK's game progress, but it's rather my interpretation. Due to (probably) Demon Queen Deity's influence, Hamachi would probably grow stronger via just downing and/or eliminating the friends just to deal more damage and run faster. If Last Man Standing occurs, the last remaining friend is highlighted to him.

Any opinions of those?