Jorgen: Yes... I remember!... I... I'm not fully mortal. I'm sure a full explanation would be wasted on you, so let's say it's not mitra blood that flows through my veins. However, I am still an imperfect being... Only in exchange for the temporary loss of my memories was I allowed to stay in this world.
You can talk to Jorgen in Cafe Moondust after being hired to obtain his Parameter Bonus. He will be standing on the second floor to the right of the stairs.
Once you complete the quest Amnesia. His initial stats and class depend on the items given, see the quest for more details. Earliest availability after entering Undelwalt.
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