Its likely this has been done before but why not start up a new one?
so basically all you gotta do is take your character and say what song suits them or fits (whether it have been chosen by you, picked due to a phrase you say, or stuck due to insiders and jokes :3)
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for me i only have one character that so far has had a song placed for her XD it stuck due to a phrase i've some how begun saying a few months back thats developed into a insider with me and other ancients on the Chaos shard ;3.
KisaCrescent:
Song: Everybody Loves Me
Artist: OneRepublic