[He just pointedly ignores that, sort of the way he avoids telling Jack he's sort of been sleeping in Tadashi's bed since he arrived in Cerealia. It's complicated. The whole...thing is complicated. He knows he can't really avoid it though, especially when Jack presses the subject.

The smile dips into something a little more solemn as he gives him a contemplative look.]

...I couldn't save everybody in our group. [That's the first problem.] We tried, but we couldn't do it. We still lost two of them, and Baymax had to escape with Terra to take him to the hospital so it was just me and Korra at the end. [And finally, quietly, he admits something he hasn't said to anyone else just yet.] I should have been more careful when we were separated from everybody else to make sure they got out alive.