I already did the character sheet for Morrigan, this time tried it for my character Fetcher. Honestly he was easier to draw in the Rise of the TMNT art style than I thought he would be.
If you wanna read my cringe self indulgent ramblings about how I think he'd fit in the world, its below the cut (also I've only seen Season 1 and the movie so sorry if this is somehow already a plotline or very similar to another character idk)
Alright I picture Fetcher starting out as a get-away driver for some of the bad guys of the city, doesn't like his job but he needs the money, and he's good at it, (and that could cause issues and conflict later yippee). He's half yokai, half human, kinda living off on the side of both worlds, he's pretty familiar with navigating both worlds but isn't particularly close with anyone from either, feeling a bit of an outsider.
I think Fetcher would probably get involved with the team through Mikey. I figure it could also partially be a result of Mikey wanting more independence (like with the episode of his solo mission), seeking out a friend outside the group (kinda similar dynamic to Raph with paper soldier Buddy, and April with Sunita). I think they would be foils with that since in Fetcher's case he's probably had *too much* independence, being a kid who's not had a lot of guidance and it's gotten himself in a rough spot working as a get-away driver. But on both Mikey and Fetcher's part they'd both have that similar feeling of needing to prove themselves.
I figure for an actual short story plotline, Mikey probably talks up the turtle tank after seeing how much Fetcher is attached to his own car (which I imagine would be all decked out with stuff since he's a getaway-driver), Fetcher's immediately enamored and wants to see the tank, Mikey wants to impress so he goes to get it. Mikey doesn't want to involve his brothers, so at first he asks to borrow it which gets a resounding NO from the whole group, so shenanigans ensue when he decides to steal the tank from Donnie.
Mikey tries driving the tank himself, obviously it goes badly and it results in the brothers having to chase him down with the help of Fetcher to stop the tank from causing chaos in the city.
I think at the end when they do finally get the tank under control and get Mikey out, there could be a nice moment with Mikey admitting the tank isn't his, (and he doesn't know how to drive it on his own), and he did it cause he wanted to impress Fetcher since he has a cool car and wanted to seem like he had one too, and Fetcher seems to really enjoy talking stuff like that. And Fetcher can share understanding that feeling of needing to prove something, and getting in over his head because of it, but reassuring there's nothing to prove. Plus there could be a moment of Mikey and the brothers talking about Mikey wanting independence being the youngest brother vs being kinda naive at times.
And idk then Fetcher can geek out over the turtle tank in the background and blabber to Donnie about it, that'd be fun.