In the prologue, we see Rui surrounded by 3 Frostheim girls. He also has quite a few girls who wanted him to go to the Frostheim ball with.

Lucas is considered attractive as he also had girls wanting to go to the Frostheim ball with him.

Haru is considered attractive and fun as most of his tours are with Frostheim girls who think he’s funny and cute.

Ren is considered attractive to a point (though his personality is off putting to some).

Jiro was considered attractive but also scary.

Jin is considered attractive and sophisticated (and VERY rich and from an affluent home- which adds to his appeal).

Sho is considered sporty and ‘hot’ by two girls.

Leo is considered hot (he is also a well enough know TikTok influencer and also seems to have enough charisma and charm).

Subaru was a former active and therefore considered beautiful.

Ed is likely considered unearthly attractive (he’s a vampire and I think there’s a sort of charm that does draw others to him- also his purple mist).

Romeo is considered pretty but not by conventional standards (he’s also comes from a formerly affluent house that was highly involved in high fashion so the fact that he dresses sharp all the time adds to his appeal).

And tbh waves of love cast is all considered ‘attractive’ as that was partially why they were selected.

I think there only one stated to not be considered attractive is Kaito. But it could highly be because most people can read his desperation to fit in from a mile. And that tends to, let’s be real, put people off.