User blog:Kagimizu/Theme Song

I'm having a bit of trouble with theme songs, specifically for two of my characters: Raile Draxxon and Zero the Wolf.

You see, both of them more or less qualify/fit the song "Indestructible", and I had intended to use it for Raile before remembering I intended the same for Zero. So, I'm left wondering if I should use it as a theme song for the both of them, or pick for one of them. But if I have to pick, I don't know which.

So, what would you guys say? Use it for both? Or if you had to pick a character, which?