She's making a quick note of the name — probably spelled correctly, but failing to alert any historical alarm bells in the back of her head. Pirate lore was not a mainstay that had survived the nuclear apocalypse, sadly. Then she's giving him a nod, cordial and too stiff.

"Clarke Griffin," is the easy response, because that's just how introductions go. But tacked on to the end, as she gives him one last appraising sweep from head to foot:

"Good luck." With his sword, with his singing, with... just about everything here.