Trogdor is a human barbarian bard from the prime material plane. He is played by Nate.

Trogdor was a man!
I mean, he was a dragon-man
Or maybe he was just a dragon…
But he was still Trogdor!
Trogdor!

Burninating the countryside
Burninating the peasants
Burninating all the peoples
And their thatched-roof cottages!
Thatched-roof cottages!

Trogdor is the front man for a band known as Tenacious D made up of himself on vocals and axe guiter, Vlad on drums, and most recently Bartleby on triangle.