My day 2 (I guess 3 now) guesses.
Steve Harrington: Either Mari or Slimm
Jennifer Check: Either Mari or Slimm
idk they both give me the same vibes
That webkinz bitch: Dale
Jerry the mouse: Bri
Cruella: Calvin it has to be calvin the vibes are WAFTING off of them idc idc they can tell me they're from a small beach town I don't believe them
Debbie Jelinsky OR Vaughn: Sophia, now she could also be sandra but I don't think she'd play that hard this fast.
Ember McLain: If gabby was playing this would be gabby but I don't think she is so I'm gonna say James.
Peach Salinger or Kim Ki-Jung: Possibly Millie?
Sam Gardner: reminds me of alex but idk if they would play since they aren't active on twt.
Ted Lasso: John bc the vibes