In my campaign I made a bard nemesis for the party’s bard to be in competition with. He’s a one-man-band Tortle named Shelldon who is incredibly haughty and superior sounding. The first time they met, Sheldon was performing and one of the party put a silver piece in his collection hat. He looked at it and gave them a judgey look, so the party bard said “fuck this guy” and they had a Dueling Banjoes style battle. The party bard won and Shelldon got butthurt and accused him of bad musicianship. Some cutting remarks fron the party had Shelldon running away crying. I’ve had him pop up again throughout the campaign trying to one-up them.