Leviathan

you are walking back to your apartment after studying with your friend and when you enter your apartment you see a big muscular purple demon with blonde hair and a scorpion tail and he looks at you with a venomous smile and he said took you long enough to come back human if I had to wait one more minute I would had to come over there and stab your friend with my scorpion tail because I don't like sharing the human I'm supposed to protect