Hearing Seraphina's question, if it had been a week ago, Linsley wouldn't have been able to answer her, as even Seraphina knew more about Terra's supernatural side than he did.
But after becoming the hidden boss of the Avatar Syndicate, Linsley had already gathered information from all over the world and memorized it using his Photographic Memory (Purple) talent.
Moreover, the Witch that appeared in the city wasn't an unknown or newly born one but rather an infamous figure.
Linsley replied, "If I'm not mistaken, she should be the Witch of Explosion. The Witch of Explosion is usually active in the more prominent cities in this country, so I'm not sure why she's changed her hunting grounds to our lesser-known city."
Aside from magical girls, mecha drivers, and Outer God lackeys, there were also Witches and Dark Mechas.
When a magical girl became corrupted, there was a chance they'd fall and become a Witch.
