Question: What was Abby's power?
Answer: She was a gifted prodigy of martial arts.
Question: Why does Elektra / did Elektra have OCD? I mean, how did that contribute to the story? Also, does Abby have OCD as well, from the scene near the beginning where Elektra asks Abby if she was counting?
Answer: They both have OCD because because people with OCD are more likely to be a prodigy, Mozart most likely had it.
Answer: Elektra's father was a wealthy shipping magnate and could afford to maintain the electric and gas bills for a house that the family hadn't visited in years.