Dieter

"Dieter" is the nickname the Mighty Nein gave to a dragon turtle that they encountered in the Lucidian Ocean near Urukayxl. The name is derived from the first two syllables of "D. Turtle," short for "dragon turtle." As an NPC, Dieter is played by Matthew Mercer.

The Traveler has to leave the Mighty Nein on short notice to deal with a dragon turtle attack on a ship, presumably Dieter's work.

Quotations

 * "I need no mate. I take what I want."
 * "Ships carry treasure. I take what I want."
 * "I have your scent. I take what I want."