So:
Fia based on Billie Eilish.
Mio based on ???
Sol based on Elvis.
Arch based on Kurt Cobain (?)
Zess based on Michael Jackson.
Comet based on Ringo Starr (?)
Captain baldy seems familiar too, but I can't pinpoint who.
Archbishop is freaking Elton John.
And that Lawrence guy, the subordinate of Captain baldy, is freaking Lawrence Fishburne, lol! They even have the same name and teeth!