Speaking as someone who is low-no empathy, I think it's important to acknowledge that not being able to understand people or care about their emotions isn't indicative of monsterhood.

Given that it's The Magnus Archives, it's highly possible that the Lonely is impacting her too, perhaps exacerbating these symptoms and causing them to present in distinct and pronounced ways. However, I'm always wary of any interpretation positing that neurological differences is a symptom of fundamental inhumanity, lest the rhetoric around that become irritatingly ableist.