BK: So yeah, I mean honestly, I was a little worried about adding Kai just because we had so many characters. Nothing against him. And then I was a little worried-I just didn’t know because he was kind of Aang’s age and he was a little Aang-like, a little bit of a trickster. I was like, “Man, I don’t know if people are gonna like them or feel like he’s stepping on Aang’s toes or something,” but talking to the fans at comic con - man, they love Kai.
JdS: Do they like him?
BK: Yeah. I like his hair.
MDD: Yeah, he’s a cool little kid.
BK: Angie and I-we had a tough time with his design. Maybe because I was worried about him being too similiar to Aang or something and Ryu took the one Angie I had done and I don’t think we had done a good job. Ryu gave him these cool suspenders and made his hair really fun to draw.
-TLOK 3.03 with Bryan Konietzko, Michael Dante DiMartino, Joaquim dos Santos, Tim Hedrick, & Josh Hamiliton