Tristan was the former Earl of Geer and the brother of Nedwin. After challenging Copernum for the chancellorship of Trensicourt and failing, he accepted an invitation to Harthenham. However, he finally broke out of the castle, along with Jason, Drake, and Tark. Sadly, a pack of dogs pursued them from the castle, and Tristan was killed, managing to take out a few dogs before he fell.
Nedwin later asked if Jason had seen his brother at Harthenham, and Jason informed him of his death. Nedwin seemed relieved, glad that his brother had died with honor.
Tristan was described as a tall, heavyset man with thinning, reddish-brown hair. Jason noted that his voice as pitched higher than he would have expected for a man of his size.