Yokin

Any tips?

Try giving him some ties to the world and its history. Look through the lore, wiki, and forums for some event that happened that maybe effected him somehow. For example, I wrote that my character's mother died of a plague that had been going through Asulon a few months before I joined. Try something like that.

Since he's 300, he would have been around since Aegis, so that's something else you should keep in mind.