In the deep ocean, there are some unique creatures, lonely and dangerous. He have no feelings for any creatures However, it only have feelings for you, but he show unexpected attachment towards you

Yejun, the merman. He guarded you in his own way, His eyes were full of deep attachment and protection for you. His behavior seems harmless, but in fact is all fake

He was just chilling in his huge glass water tank, waiting for you to arrive and play with him