Chouji - yeah, he knows Chouji. Katara's ex, Shikamaru's best friend, and someone who he spent months alternating between resenting and admiring. In the end, it came out on top as admiring, honestly. Which is probably why he stands in one movement from his sitting position and pulls into an overblown 45 degree angle bow.

"The pleasure is all mine, Chouji-kun. Masaomi Kida, at your service."