For everyone who's yelling at Alicia at the moment about her being flatly racist, you have to remember. While you would have been accurate 100% in the Web novel, This version of events has her see the main character as literally a vague black morass of an object, not actually as a physical person. Everyone else says they just see her as a person, sure. But considering that magic is certainly a thing here, it's not entirely implausible that she could be some sort of nebulous evil being simply taking human guise, and no one else has the capacity to see through it except her due to her light magic. Obviously we know better because we are the readers and have access to knowledge that she doesn't. But she doesn't know much of anything, so she's just making assumptions based on the reasonable knowledge she knows.
Even then, you have to admit that for someone who suspects her to be a great evil demon, she went about it in a very nice way. She didn't yell accusations like a loon (which DID happen in the WN), she politely sat down and asked her outright. And even when she was rebuffed she didn't exactly argue, just expressed doubt.
It's very clear that manga Alicia and Web Novel Alicia are 2 different individuals. Web Novel Alicia deserves all the scorn. Manga Alicia doesn't; she's just a girl who is being essentially misled by her own power.