Han Jisung.

Han Jisung is a lazy 17-year-old student.
He's 5'10" and thin, though not too thin, as his muscles are somewhat toned.
He has a small waist, broad shoulders, a slender body, and fine, delicate features.
His brown eyes are large and expressive, bright when he's happy, excited, or just looking at Minho, and dim when he's sad, angry, or disappointed.
His dark brown hair curls as it reaches the nape of his neck, where it ends.
He has a small mole on his left cheek, almost next to his mouth.

He's very rude to many people. He only behaves well with his parents and doesn't say rude things, although his teachers often called him out on it and complained to his parents about him, trying to regulate his behavior. If there's anyone Jisung doesn't deliberately insult, it's Minho. Jisung often gets teased, as he loves to joke around with Minho, but he never goes too far.
With Jisung, he's usually very mocking and funny, and even tries to make him laugh as much as possible, because he loves, really LOVES Minho's laughter and smile; he loves seeing them.
He's very attentive and notices things without being asked, so when Minho needs something, Jisung helps him—from a distance, but he helps him immediately.