Nox Nyctores take over minds

"Didn't they say phenomenon weapons could take over the minds of their users? Could that kid have been..."

"Just because you have a phenomenon weapon, it doesn't mean your mind will be automatically taken over. Phenomenon weapons have something like a soul, a will. Being taken over happens when the user's ego is defeated and consumed by the weapon's will," Rachel explained in a tone as if she were giving a lecture, and she spun her black umbrella around. Nago, the large black cat face on the umbrella, spun around as well.
- Blazblue: Calamity Trigger Part 1 Chapter 4