Ground Rules:
1. Any character, as long as they are purely fictional and not historical figures, is eligible. From any genre of fiction, but esp from comic books.
2. Any song, as long it was professionally released and contains audible lyrics, is eligible. From any genre of music, but esp from rock.
I'll start and get (IMHO) the easiest and obvious pairing out of the way:
Marvel Comics' Thor and "Immigrant Song" by Led Zeppelin.
I cannot think of a better pairing of character and song than this. The tone, the lyrics, everything works beautifully. For all its flaws, THOR: RAGNAROK is memorable as a film to me mainly because they finally got Thor his eternally appropriate entrance music.
Yours?