Su-jin will learn in time that he shouldn't judge based on appearance. Experience will teach him such things. Appearances can't be trusted. Not for monsters. Especially not for demons. Their human appearances mean little. Even their monstrous or demonic appearance doesn't always mean much. He'll learn that Vena's petite, human form hides a powerful demon.

Vena side-steps around Su-jin, trying to keep himself in the other monster's view, all the while looking him up and down with a touch more interest than previously. "You're a virgin," he states rather plainly.