Friar Alan used to have [One More] by Turisas. In death, he has [Covered By Roses] by Within Temptation.
Kelpie/Isolde has a playlist here http://www.youtube.com/watch?v=Fb-Qh53pa9M&list=PLBlfFnbQDh2oEj06HKjdLQ8yLJ-k0_JyM&shuffle=450 but this kinda sums it up [This Is War]
Eudaemon has [The Ikon] by Utopia. Yes, the whole half hour. Played on a mirror-finished guitar in the shape of an ankh.
Bluebottle/Livia? has an actually serious playlist, mostly about souls and religion and so on, but the best song I have found to sum her up as a character is "Stonehenge" by Ylvis.
Porange/Igraine has a playlist somewhere, only some of the songs are about poison, the most notable parts of it being "What is this feeling?" and "No Good Deed" from Wicked