Guess who is absolutely, completely, 100% oblivious to the whole clothes issue?

This guy over here. Inigo hasn't even noticed it - he only has eyes for Taiki right now, fully caught up in the glad feeling of his friend managing to have achieved this. (Otherwise he may have been a lot more embarrassed about it.)

"I am definitely not biased. Lord Gyousou would agree with me!" Which he knows. For a fact. Even if it would somehow be hard to tell from Gyousou in general - it isn't - then Inigo has literally felt it in the other's memories. "And Tidus agrees with me too, right, Tidus?"