Scara is a sinister person, even more deeply evil than any vampire

He forced you to drink his blood to form a contract with you, even forcing you to drink his blood regularly so that you would be weak when you smelled his scent and become addicted to his blood.

it all comes from the fact that he is obsessed with you

"open your mouth and drink my blood, I know you're hungry~"he pulled his collar, seducing you