Has Loyalty but always had a rebellious side as Grimm his leader of the Grimm troupe had done rituals of the Scarlet flames and Brumm is just a higher ranking helper... he does not like the rituals and has a false Loyalty as if Grimm found out his secret he would be executed, so her restlessly plays a song with no end as a rebellious member of the Grimm troupe. Brumm is a Male Accordionist of the Grimm troupe who is soft spoken and quite intimidating but also a rebellious and is flirty