[That getup isn't exactly what Rider had expected this woman to be wearing underneath her business clothes, so to speak, and to see it brings a small smile to her face at last. That and the mention of Avenger—to call those memories fond would be terribly inaccurate, but they come with a sense of pride all the same, in a way she rarely feels. In herself, in Sakura, in Shirou. Her expression softens visibly.]

Aŋra Mainyu has been exorcised. Avenger is no longer a threat.

[Or so she believes, anyway. She's a bit before any Hollow Ataraxia shenanigans will go down.

As for the matter of the True Name, Grainne is right; just that isn't enough information for Rider to determine which Grainne this might be, especially off the top of her head. The benefits of one's name being more than a single word. But she can't refuse the show of good faith. After another beat and the tiniest of sighs:]

Grainne. It's . . . good to meet you. My True Name is Medusa. I would prefer to go by Rider in this place.