"You must tell me more -- it sounds so fascinating."
Kai has a pretty short history, despite being reasonably old. Sprites aren't terribly aware of how they reproduce -- new ones appear and old ones disappear, with folklore stating that old sprites become spirits. Kai grew up in the village he appeared in, learning what he could about the world and magic. He was pretty much sent with the cast to get him away from the village. Kai's own reasons for helping the crew is to become famous for documenting the first alien visitors and belief that Delwyn was a right bastard who would kill every sprite if given the chance.
Kai is a bit of a blowhard academic -- smart, egotistical and highly extroverted. He doesn't have a high opinion of most people, though he slowly warms to the cast as the traveling gives him something to do with his mind. He's also reverent towards the spirits, seeing them as pretty much like his patron gods.
Flight, water-breathing and general water magic, plus some healing abilities.
( efficio )