I have no idea what this phrase is supposed to illustrate, let alone identify what part of it is supposed to be the adjective. Are you trying to say une fille blonde comme le soleil? If so, I think this particular exercise is not clear. It seems like a tossed word salad.
In English, one would generally not say "a blonde as the sun girl" one would say a girl as blonde as the sun. Though to be frank, I would not say that, either.