The clinical diagnostic process for autism is complex, especially because of the high co-occurrence with other neurodevelopmental and mental health conditions (Gillberg, 2010; Lai et al., 2019). Diagnosis is more complicated in youth and adults than in younger children because life experience and development affect presentation. In particular, it can be difficult for clinicians to differentiate autism diagnosis (and traits) from personality disorder diagnoses (and traits) (Vannucchi et al., 2014). Clinicians need to exercise thorough history taking with the individual as well as key informants, and use a developmental lens with an ecological systems perspective (Bronfenbrenner & Evans, 2000) to understand how the personality of an autistic/neurodivergent individual emerges in the context of their environment, and how this may differ for neurodivergent versus neurotypical people, so that support can be tailored appropriately (Lai et al., 2020).