Here's a breakdown of the clues:
* Obsessive behavior: Her clinging to Homer Barron, even after his death, shows a disturbing obsession.
* Delusions: She believes she's still married to Homer, despite his death and the clear evidence of his absence.
* Lack of empathy: She shows little remorse for Homer's fate, indicating a potential lack of empathy and understanding of the gravity of her actions.
* Manipulative tendencies: She uses her social standing and family history to manipulate the townspeople and get her way.
* Isolation: She lives in seclusion, avoiding contact with the outside world.
While the story doesn't name a specific disorder, Emily's behavior aligns with characteristics often associated with schizophrenia, delusional disorder, or even psychopathy. It's crucial to remember that the story is open to interpretation, and her condition remains a mystery, reflecting the enigmatic and complex nature of her character.