Haven't read the book but since some people want to analyze and categorize her, proposing another idea between ASD and ASPD – schizoid PD. Some potential characteristics being: preferring to be alone (extreme introverion), indifference to social conventions and criticism, flat affect and/or stunted emotions, apathy towards relationships, introspection, secretiveness, not wanting to stand out, possible lack of empathy, lack of goals and aspirations etc. Usually not violent or impulsive or lacking the ability to read facial expressions, often confused with ASD...