The first time Niken watched a mermaid show with Kazuto and others, Niken did feel someone was trying to penetrate her mind. At first, she didn't realize it and didn't think too much about it. Niken also decided to leave and not watch it until the end because her heart was too disturbed and uncomfortable.
'Save us, please. Someone save us!'
Niken heard that voice in her head. The sound looked hopeless and hoarse as if it had cried. Thinking it was only the voice of a mermaid trying to trap her, Niken ignored the voice. Instead, she built a barrier in her astral dimension so that no one else tried to enter her mind.
But at night, who would have thought she was careless and without realizing the same voice again entered her mind's cell. Only this time, it was not a voice of despair or crying. But a lovely melodious voice made her lulled.