How do you think Kanna reacted to Hakoda and Bato adopting Aang, Toph, and Zuko?
She honestly is not surprised when she sees Bato has adopted Aang Toph and Zuko. She knows he has a record for being a bit of a surrogate father for a lot of the young children in the village and for that, she isn’t surprised to see either of those three around Bato at any given point (or Toph practically glued to his side when they leave meetings). What surprises the hell out of her is when Hakoda seems to have adopted these children who absolutely are not his own. She knows Hakoda to be a traditionally possessive person over his family. What’s his is his and what isn’t his will not be his. That’s what she thought him to be for a long while. But when she finds Zuko embracing Hakoda after a long day of meetings and such, when she sees Hakoda and Aang out fishing and overhears some horrible dad jokes from him, and when he spots Toph timidly standing by him and him accepting it, all the same, she realizes that her son loves all those that need it. And these three kids, these three kids who have been hurt far too many times in their short lives, definitely deserve the love Hakoda can give them and she is nothing other than proud. (Of course, when she sees the two of them out with the kids together she can’t deny how much of a family they look like and never fails to remind them of that fact.)