One song that I've been listening to for decades is "What I'm Made Of" by Crush40 and it's the final boss theme from Sonic Heroes. It's my no. 1 favorite besides "Live & Learn", "Live Life" & "Sonic Youth", but it also speaks to me on a personal level.
To get to the point of this is that I'd love to imagine it as Josi's theme, especially for the final fight of the saga - after everything she lead her team through, all the hardships and sacrifices they had to face to get to that point and not going to give up, when they've come so far, the song pretty much fits with her character arc and how she's going to push beyond her limitations to ensure her team being able to live normal lives. It oozes that shonen-energy and I love everything about it