Chalarax

A chalarax was a creature that had spots. It could not change them, and, based on that fact, sometime before 3954 BBY a proverb had been formulated. That year, when Jedi Master Atris refused to let go of her distrust for fellow Master Revan despite the former's redemption from the dark side of the Force two years earlier, she quoted the proverb, comparing Revan to a chalarax.

Text and facts from the “Chalarax” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.