Did she blush because Umi asked her about what she thought of Kazuya, and she said “I don’t not like him”, and then Umi repeated that to Kazuya? Though I would expect her to get mad at Umi, not embarrassed with kazuya if that was it
「Kukuku..... That guy is among the four heavenly kings, but the weakest」
I dismissed, who for some reason became the hero and saint's teacher
Or something like that. I can’t find it.
Try to stick with the same font size unless the text box is too big/is trying to emphasize something
Also, what the other person said, center align your text.