Anagathics are fairly common on his home planet of Deryni in the Korlon Subsector of the Foreven Sector, and his family was a major user of them. That's why he still looks like a 20-year old (or younger) when he's actually 43 years old. He claims to be a follower of the Spacer's god Noshabkeming, but often swears by the other Spacer's god Klono.

Height: 5'10"
Weight: 177lbs.
Eye Color: Dark blue
Hair Color: Black
Hair Style: short and wavy
Facial Hair: none... ever... result of the anagathics
Other Distinguishing Marks: Heart-and-arrow tattoo on his upper right arm with
   the name 'Marla' in the heart--the girl he left behind.