@InvinCybul
@Furioustoast
Not this again. Trying to find similarities in the design between one of the sisters and the bride is just idiotic.
They are quintuplets. They look the same. They can grow out, cut and style their hair.
They can also pierce their ears a day before the wedding.
Besides, Ichika has one earring. The bride has two.
No, that's quite silly. First, are we supposed to assume that they are identical sisters, split from the same egg? Crazy. Assuming that they are (which they are not), then there is development, upbringing, and growth. Birth marks are not genetic, they just form randomly. So they would have different birth marks. Depending on diet, exercise, illness when young, etc. there would be other difference. Yotsuba is obviously more muscular. Itsuki is a bit "softer," Then there's sun damage, scars, and other marks. Of you could just study their noses, which would all be slightly different. Then there's grooming, voice, inflection, word choice.
That all said, I find it hard to believe that he CAN'T tell them apart yet.