Niken remembered finding a rabbit trapped in a hole when she was a child. She and her twin brother saved the poor animal and planned to bring it home.
But on their way, a lioness appeared to confront them. Two young children encounter a wild beast for the first time and are more concerned with their sibling's life than the rabbit they have just picked up.
In the end, both of them failed to carry the rabbit along and fled without realizing the lion already pounced on the poor rabbit.
It was a terrible sight, and Niken is still not recovering from her guilt. That's why she can never let the people around her suffer or get hurt.
Every time someone got hurt in front of her eyes, she also feels broken no matter whether that person is a stranger or not. It doesn't matter if she gets hurt. Even though she felt scared and helpless, she wouldn't feel guilty for making the people around her hurt to protect her.