Soon after his first appearance, he takes Zoë out on a "date", where she realized he was only interested in her because he thought she could introduce him to Dr. Lorna. Later, he reappears for Love Potion (chapter), where Gwynn uses a love potion on him to try and get him interested in Zoë (as Gwynn's way of trying to make Zoë more comfortable with her using magic). However, the love potion spell goes horribly awry.
We next see Dex in the K I T T E N storyline, where he has finally decided to make a move on Zoë (his efforts are largely ruined by Torg and Angela, with help from Bert). Unfortunately for him, he soon meets his demise at the claws of the EVIL.