I feel a little bad here because it is almost entirely Jinx all the way down on this one (look! kicked so many of my favorite buttons several times in the face) but to go through them anyway
blorbo (favorite character, character I think about the most): yeah it's Jinx. younger siblings with abandonment complexes tenuous sanity and a hunger for blood my beloved now and forever
scrunkly (my “baby”, character that gives me cuteness aggression, character that is So Shaped): honestly in light of the post I just made I'm going to put Jinx down for this one too. and I am specifically saying Jinx. yes Powder is actual baby but she doesn't reach full baby status until she's murdered at least 10,000 people and that's just facts
(in actuality though I think it's Viktor. I think it's the one-two combo of the voice and the smile. somehow those two things combined and I was just like. oh no. I want to put you in a terrarium)
scrimblo bimblo (underrated/underappreciated fave): I feel like to a certain extent this answer depends on fandom and I don't know enough about what happens in fandom to really give an answer here.
maybe Mel or Sevika? both excellent, also both have very sexy character designs. not that all of the character designs in this show aren't sexy (they are)
glup shitto (obscure fave, character that can appear in the background for 0.2 seconds and I won’t shut up about it for a week): I feel like there's not really enough characters in this show to make any of them particularly obscure, and unfortunately my brain is too busy going JINX all the time apparently to pull out any who would potentially hit that
poor little meow meow (“problematic”/unpopular/controversial/otherwise pathetic fave): JINX 100% I love a character ruining her own and everyone else's lives. complete and utter disaster, you go girl
horse plinko (character I would torment for fun, for whatever reason): actually, while Jinx goes here for sure I'm going to throw a curveball and say "also Silco though, would totally plinko Silco and enjoy it."
eeby deeby (character I would send to superhell): I love Mel's mom and her character design is extremely sexy but I would send her to superhell, if you know what I mean.
but also kind of Jayce. it's not his fault I think he just rubs me the wrong way for no good goddamn reason