Seulgi - Joohyun’s closest confident (maid, bodyguard), best friend of Joohyun and Seungwan, imperial guard of the seventh prince, in love with Joohyun but keeps her feelings hidden, willing to resort to ruthless means in order to keep her promise. 

Up next:

Joohyun – (6/9)

Seungwan - (6/13)

[Bonus]-  (6/16) {Comment who you think this'll be!}