The other turtle is Joli, a spiny turtle yokai based on this google image specifically lol

a lil closeup of Joli specifically because he has my entire heart right now he is my precious son

Joli

Joli is a spiny turtle mutant

Created and brainwashed by the Kraang but saved by the resistance (remember that Kraang labor camp from the movie?? Yeah…)

The turtles personally helped him recover

Formed bonds with Raph first, then Mikey, then Donnie, then Casey (notice Leonardo is last)

Joli and Leonardo butt heads a lot, especially once Joli’s old personality comes back. He’s quick to criticize and correct Leonardo, which leads to a couple of people doubting Leonardo’s leadership, especially after Raph is gone

They have a bit of an emotional moment after Leonardo saves Joli’s life during a mission gone wrong

Enemies to friends to lovers

Joli dies during that final mission (the one in the first four mins of the movie)

The only reason Mikey died was because his powers had to be strong enough to send Leo and Casey back to the past, as well as place Joli in the past timeline- one in which he didn’t exist before

So now Leonardo and Casey meet Joli in the “past”, Joli’s still Leonardo’s age when they meet, but he remembers nothing about the other timeline, meanwhile Leonardo remembers everything about his husband and Casey remembers everything about his adopted second father

Basically Leonardo has to help Joli remember/ basically fall in love with him again, all while trying not to freak him out about… the whole situation

Some little fun facts include that Joli’s favorite color is indigo and he loves spicy food

another little fun fact is that Joli went through a big redesign, if you look for him in my class doodles you’ll see he was actually a yellow bellied slider before but I saw that spiny turtle on google and was like “I want that one” lol