for the character ask thing: Movie Kai and/or Show Jay
Starting with Red/m!Kai- actually one of my favourite characters oh my gosh I love this coffee-addicted lad-
Okay, okay, I'm biased by fanon Red. Canon Red- still pretty great (the birthday hug, the "I GOT YOU BRO" as he carries Black/m!Cole to safety, and the "I THINK I MADE IT WORSE-" are all iconic), but I'm not a fan at all about the whole 'blame Green/m!Lloyd' thing (which the entire squad did, which makes... absolutely no sense given any of their characteristics). I'm convinced Red has a concussion for the entire movie following the Meowthra Attack (I had some buddies in engineering do the math- yeah, based on the clip of Meowthra hitting his mech, that is enough force for a concussion, and Red does show a lot of concussion symptoms in the movie past that point, including delayed responses and quick changes in mood) aaaand I'm getting sidetracked
Fanon Red? Peak character, absolute blorbo. The SPBNR fandom has taken some of the few character traits the movie offered and ran. He's a coffee-drinking conspiracy theorist with seer powers and a truck-load of insecurities that loves his family very much and just wants to help- even if they end up helping him more because he gets himself into very bad situations. I can and will gush more about character studys, hcs, and the like about Red if asked
Second one- s!Jay / Robin! Very interesting. Used to be my favourite character (though I'm biased- I adore characters with lightning powers), still is one of my favourites- but mostly because of fanon. Canon... eeeeh. Toss-up. I see glimmers of some great possible character arcs in the show that are unfortunately never followed through.
Skybound? They at least went for a character arc, I'll give them that, but just... yeesh, some of it was hard to watch. I do personally wish (ha) they had instead gone for something involving social or general anxiety because as someone who digs worse holes for themself when panicking, I absolutely could relate to not wanting to tell others about a mistake you made. Anyways, getting off-topic again (alas, ideas for re-written Skybound, you will be shelved until someone asks)-
I do like the gremlin approach canon seems to be taking and the fanon definitely is. Chaotic smart dumbass, that one. Love the idea that he's actually 'in on it' in the core shorts with Wu and the principles of Spinjitzu because Wu caught him doing something he wasn't supposed to and blackmailed him into helping set everything up.
S12 / Prime Empire is also quite interesting to me because you can very much feel the echos of the early concepts for the season (with Libber) and even some Skybound trauma hints in how Jay struggles more when the others start getting cubed one by one, but it's not gone into as much as it could. Fanon seems to have a better grasp on his character, but it's such a slippery one that it's difficult to figure out. S9 handled his character surprisingly well (even if the fact he canonically lost his sanity for a short while is glossed over a bit in canon and fanon), and I'm so glad they brought back the inventor thing- even if it was just for a short while. Let him be the out of the box crazy inventions guy of the team, dammit!
Peak part of the dumbass trio though. Fantastic dynamic there. Watching him, Cole, and Kai absolutely goof off still manage to get things done is hilarious.
The name pun is seriously great too- and very easy to bootleg. I'm begging the series to let him use the alias of "Crow Runner" sometime
Overall, both cool characters, both done a bit dirty by canon, both better in fanon
Oh, and their ship name is Expresso. Because coffee.