What did Niken like and dislike since she was a child?
She likes a lot of things and very few things she dislikes.
But the thing she dislikes the most was people who cheat on others. Plus, that person was playing with a mother's feelings! That person just considers life as meaningless and takes it lightly.
This kind of person is the person Niken hates the most.
Because it was so knowing that this mix-blood wizard gave Xehan poison, Niken didn't care about Kazuto's and her mentor's warnings. She didn't care whether her identity as a wizard would be discovered. All she thought about was one, which was to get this person to give her the antidote.
Niken got up and swung her hand downwards to reveal a woman-only dagger from within her astral dimension.
During her training with Lionel, she didn't just learn to find her magic seal. But she also learned some martial arts under Kazuto's tutelage.