Okay so I just published another version of this one, but then I found this one in my drafts from February, so I decided to just publish it. A few are replicas, but that's fine.

Note: these are just some of the ones that popped up when I was shuffling.  This is not the most representative song for each one.

Sirius:  "Naughty" from Matilda.  He feels like the kind of guy that would prank someone to take control of his fate.

Peter:  "Lost" from The Lightning Thief Musical.  Idk why, but I always view him at kind of clumsy, and as such, prone to getting lost.

Remus:  "Believer" by Imagine dragons.  The pain just seems to roll with Remus, and no one ever believed in him because he was a werewolf.

James:  "Loud" from Matilda.  I don't completely agree with this, but before he was a seventh year he was all about showing off and bragging.

Lily:  "My Grand Plan" from The Lightning Thief Musical.  She is always underestimated, and I feel like she was a mastermind.