Friendly and upbeat, yet cautious and a bit timid, as she's aware of her weakness as compared to others of her kind, or even as compared to other species. Still, there's a brave spark within her heart, and Kréssa would never abandon a friend, no matter how terrified of a situation she might be.
She prefers female pronouns for convenience in communication, but does not wholly identify as female - 'female' is just the closest general ballpark and good enough, in her opinion.