Yuher is a tall, black-furred Bothan with a lean build and a rugged jaw. He wears a well-maintained armor cuirass, shoulder pack, and a utility belt under his cloak; the wrist cuffs stored on the belt mark him as a bounty hunter, but instead of a holster for a blaster at his side, he wears a light saber.
His posture seems relaxed, but if you watch his eyes you can see that he's constantly scanning the area around him and that he subtly turns to face anything that could be a threat or of interest, sometimes before it happens or comes into view.
When he talks to someone, he's calm and direct--surprising, you think, for a Bothan. Where many other Bothans you've met bluster and flatter, Yuher wastes few words. He projects an honest, almost trustworthy air. It's probably Jedi training. Or Jedi mind tricks.

If you run a data scan on him, you'll learn that about five years ago, he was involved in a massacre in Hutt space and that his Padawan died during the incident. Details are frustratingly scarce, but by reading between the lines, you get the feeling that Yuher killed a lot of people and that he was summarily ejected from the Jedi Order soon after.