Thinking about songs, what would be your Character's themes?

Zerobot’s theme is going to be The Robot’s Happiness (ロボの幸せ) by Serani Poji

No More Lies - Thundercat, Tame Impala

Phish^

I'd have to say Gas Mask's theme would be Haunted by Shawn James. Describes just how f**ked his path became.

Find your one way, Guilty Gear - X

Definitely disassembly required

I assume you already saw Kazimir's theme

If not:
https://www.youtube.com/watch?v=ZD6RUiC6YHc