Rusty Trombone

Taliesin's dragonborn paladin was the character that Taliesin Jaffe played in the first session of Matthew Mercer's campaign that would eventually become Critical Role. It was during this session that Vox Machina first encountered The Myriad.

It is unknown what type of dragonborn he was but it is known that he had cold breath. This narrows the options down to silver and white.