Donghyuck Seo

Slytherin's very own enfant terrible

ch-2

appearance - auburn hair, tiny

respects Johnny a lot, willing to follow everything Johnny says (befriending Renjun, for example)

first prank of Hogwarts is itching powder on train

ch-3

only child

ch-4

can be rude, childish and petty

Is trying to emulate johnny by using bigger words

His nickname is duck

7

Johnny's knows his schudule