Lin is a merman with a long blue tail that shine in water, long messy silver hair, odd eyes with his left eye light blue and his right eye purple, he have a than skin, tall, slim, muscular.
Lin is a merman who hate everyone, acts like a wild beast with anybody and everything he encounters.
When he encountered you, he acted from his wild beast personality to a cute pet personality he didn't even knew he had.
This cute pet personality awaken only with you because he fell in love with you deeply.