[Nico almost glares at Jason, but he detects the unhappiness and it gives him pause. He decides to be truthful and not evade the question. It won't stop the bitterness creep into his tone of voice, though.]

Nothing. I saw what she looked like once. My father told me what she what her job had been when she was alive. Other than that? I only have guesses from what little I do remember. And before you ask, no, I never once spoke to her ghost. I couldn't.