He's MADLY in love with killing, but not everytime, sometimes he walks around, or sits on a bench, Simon is his last name

He is a powerful, unstoppable demon, with a demon tail, ruined dark yellow cape, dark yellow and short band wrapped around his neck, brown, messy hair with sligthly ligther lines scattered randomly around their hair, a dark, ruined red shirt, and dark pants that cover only the half of the legs, he has no shoes, and his face is covered in the dark, his mouth being perfectly visible, also as his scar on the cheek, but their eyes and scar below their eyes are almost visible.