This is just the characters I like (sorry Chris fans, I hate him-) ANYWAYS

Albert Wesker

This mans theme is Stray Bullet by KMFDM. One of the lines is LITERALLY "I am the illegitimate son of god" if that doesn't scream Wesker I DON'T KNOW WHAT DOES (other than me) 

Rebecca Chambers

I want to say Wayward Prodigal by Cora Reef (who I happen to be friends with :D) because they are very Rebecca Chambers, but at the same time Krank by KMFDM is right there (yes, alot of these will be KMFDM)

Jill Valentine

I listened to Nine Inch Nails while I worked on getting an S Rank in RE3R so I'd have to say Head Like a Hole by NIN. I can see her hate listening to this while glaring at Wesker or something-

Jill and Rebecca (P30 infections)

Professional Killer works for both of them. I put a lot of KMFDM music as Wesker's so it makes sense that my fave song from Hau Ruck (with Lucia doing most of the singing) would be there theme while under Wesker's command.

Ada Wong

Megalomaniac by KMFDM. I found KMFDM because an Ada cosplayer used Megalomaniac for one of their Tiktoks THANK YOU WHOEVER YOU ARE YOU SHOVED KMFMD INTO MY LIFE!!

Carlos Oliveira

I am a simple, basic man. Just as it reminds me of Johnny Cage, California Love reminds me of Carlos and I DON'T KNOW WHY I'M SO SORRY I DIDN'T EVEN LISTEN TO IT WHILE PLAYING RE3R.

Ashley Graham

THAT'S MY FUCKIN' GIRL!!!!!! I HAVE A FUCKING PLAYLIST THAT REMINDS ME OF HER I HAVE AUS FOR HER AND EVERYTHING OMGOMGOMG-

Ashley has multiple themes and I don't care she deserves all these damn screw you :p anyway girl has Take Your Shirt Off by Millionaires, Mama by My Chemical Romance, You're Not Here by Akira Yamaoka, Dance Commander by Electric Six and Kunst by KMFDM. I see her listening to all these songs I danced with Wesker at comic con while I was cosplaying Ashley and it was to Kunst by KMFDM that Wesker was such a sweetheart.

Luis Sera Navarro

Like Ashley (and Jill and Becca technically?) Luis has multiple songs. One is an inside joke with my friend, the other is just because it feels like something he'd gladly listen too. Gay Bar by Electric Six and Fresh Meat by Ayesha Erotica :p

Karl Heisenberg

WHO SAID RAMMESTIEN BECAUSE I SURE AS SHIT DID!!! This man would listen to metal religiously and I don't care. His theme would be Sonne or Du Hast; maybe both.

Sherry Birkin

Sherry has two because she appears in two different games with different levels of maturity. For 12 y.o Sherry her theme is Precious Hewie from Haunting Ground :3 Sherry in RE6 gets Duvet by Boa. Why? Because it's a pretty song and she deserves it.

Anyway those are all the characters I can think of. If there's any RE characters that you guys can think of themes for then shout them at me in the comments or something :3