It's a reaction Ixidor has seen variations of for over a decade, now. That 'holy shit, Adrian Isaacs is Awakened!?' that Asp did an admirable job of grappling with. He never grows tired of it. It's supremely flattering, really. A good feeling.
And to be honest, when he'd first returned from the Watchtower of the Golden Key, his response had generally been a super-excited 'I know, right!?'. Or, whatever the equivalent catchphrase was in 2004.
But despite the cute double take, where the rocker pictures something involving a deer and headlights, she handled it pretty smoothly. It's a good balance, on both ends of the spectrum, and he isn't surprised to hear her say that she's an Arrow. Quick assimilation and adaptation of new information to adjust tactics, and all that.
"Ixidor, among us. Silver Ladder." His tattooed hand is still shaking hers, casually. "'Asp', huh? That's a cool enough Shadow Name." He quirks an eyebrow and turns his head slightly as though to look at her with sidelong curiosity. "Shaman, maybe?"
Animal Shadow Name is a Thyrsus thing usually, right? He's not about to scrutinize her to try and determine it himself. That's just rude, since they're being friendly. As with his more mundane senses, sometimes it's more fun to imagine what's underneath, first.
The rocker hasn't let go of her hand, yet, unless Asp chooses to disentangle herself first. Otherwise, he politely does when she begins to respond.