Kana really called him out this episode and hit the bullseye. He is always putting up a flawless front, whether that is emotionless stoicism, or feigned geniality like on the dating show. He doesn’t know how to express actual emotion because he tries to never feel actual emotion.

I totally get how seeing flaws in Aqua actually makes him more likeable. It reminds me a bit of kintsugi, a pottery repair technique in which the previous breaks are actually highlighted and treated as part of the history of the object instead of hidden, adding to the piece.