Sumin knows Iseul only through Kellan, and only really then because Suho asked about him when they received the invite initially. Well, when Kellan received the invite. If either twin received a formal invitation, Sumin was not made away. It could simply be that Suho tucked them both away somewhere and forgot to ever tell him. Not that it would have stopped either of them from joining their prince at this event. It should always be understood that they are Kellan's +1 and his other +1.

Fashionably late. Sumin hates fashionably late. Where the Princess not Kellan's sister, Sumin would have insisted she find her own way here whenever she was finally ready. Alas, he had to settle for simply looking at the time and sighing (two things which he's certain only Suho ever noticed). But finally, they've arrived. Thankfully, they've arrived. Every minute past 8 o'clock that they weren't here was like a fresh knife in his chest.

Sumin and Suho arrive dressed to match their prince as well as each other. They're wearing matching jackets, with Sumin's being the same shade of red as the inside of Kellan's jacket, and Suho's being the same shade of blue as the outside, as well as simple black dress pants. Their masks are a similar style to Kellan's as well, though the filigree on Sumin's evokes images of the sun while Suho's, of the moon.

"What would you like to do here first, my Prince?"