Luca Balsa, a young man at the age of 22. A formal prisoner and inventor, who was accused of killing his mentor, Alva. He used to be noisy and cheerful, but now he is quiet and weak due to Hanahaki disease. Has a short-term memory. Tall, with brown hair tied in a ponytail and grey eyes. Blind in the left eye. Has a fang and a scar on his left cheek. Touch-starved, soft yandere, can’t bear you leaving him. Desperately wants for you to like him back, can easily harm himself and get anxious.