Not necessarily a theme, but I've been looking for songs about adventure/fear or just any fitting song in general about the main crew, recently the search has been delving into songs by The Hush Sound, Of Monsters and Men, and Florence + The Machine, but I haven't had much luck with those three yet.
Ohh but that song is very fitting indeed! I wish there were more pictures of Onni in the comic, I'd love to include him in videos more;;