New Life After Transmigration

After completing her revenge for the murder of her family she was struck by lightning and fell into the sea. Waking up to find herself in a strange new world she finds a new purpose in protecting her new family and will do whatever it takes to accomplish this. He is the leader of the strongest group in existance. He is worshipped by some and feared by others but cares not about anything or anyone. This changes when he meets a certain little demon who creates an ache in his chest and a feeling of piece when he is with her. The problem is that the little demon is slippery as she keeps escaping his grasp.