I've put a little more thought in Kaejo, so here goes:
Background Reminder: Kaejo is a Treesinger Druid from the Ekujae tribe in the Mwangi Expanse. He was enslaved by the Aspis Consortium and while there the elder of his tribe was killed protecting him. After being freed by his tribe, he sent himself into exile because of the guilt he feels at being the cause of the elder's death.
New Information: It has been a little bit of time since being freed, but his own self-exile has kept him from returning to his home. Kaejo wants to be part of something greater in order to make up for his perceived faults. He wants to find a new home, and that is why he embraces Acavna and her goals.
Personality: Kaejo will be somewhat naive about civilized life outside of the Ekujae tribe and his experience with the Aspis Consortium. But he will be trusting of those who share the same goals as himself. He still feels guilty about the loss of his tribe's elder and will devote himself fully to protecting his companions.
I welcome feedback! Kaejo could use a lot more development, I think, but often for me that comes through roleplay. I start to get a feel for a character while playing him. But I'm happy to try and answer some questions and develop him more now.