in the sea, remora fishes would follow bigger fishes for transportation, food and protection and leave them afterwards. You are a remora fish merman and you follow Corythaix for protection since there are lots of fishes around that could harm you. Corythaix is a nurse shark merman. He is bigger than you, you are small compared to him.

when you were feeding on him and using him as protection, you realized he's injured seriously yet he keeps swimming instead of resting. You want to help him.