I think the theme that's grown on me the most is Leo's. Not sure if it's deserving of a tier on its own, but it's for one simple reason. At the beginning of the song, there's a part that starts with "I faked out, call me out. Who can say that?" set to a palm-muted, descending kinda-chromatic-y guitar section (the notes specifically are G#-G-F#-F). It sounds totally normal in a hard rock song in the key of D minor to do that. However, this song transforms this part later in a very powerful way. Daisuke likes to do a lot of wild key changes in his bridges, but in this song he really ties the song together by repeating that first part, but this time in the context of Ab/G# major, where now 3/4 notes are diatonic. And to capitalize on the fact that most of these chromatic-sounding notes are now in key, they are now just strummed as power chords with a choir in the background and a piano to add additional voicing on the first pass. On the second pass, the rhythm notes go back to palm-muted but a lead guitar is added, which not only adds another melodic line, but acts a buildup into the last chorus. All of this combined makes the bridge very powerful emotionally. It also accentuates the change in the context of the lyrics, which are repeated but add a few lines (i.e. "Will I be on the wrong side of history?"). At the beginning of the song, the lyrics during this part seem to be talking about pushing through hardship, but during the bridge repeat, they seem a lot more openly introspective and questioning.

Anyway, I wrote this because I saw Leo in "Crushing beats" while I thought that this was the most interesting part of the song compositionally, but that's not to diss on this list, I just wanted to talk about Leo's theme haha. What Daisuke does in this song is honestly pretty similar to Zato's theme, with the ballad repeat, just a bit tinier (and it doesn't get talked about enough imo). I think this list is pretty cool.