Alphys has been spending a lot of time on the coastline; she's been around bodies of water before, of course, but never ones this big and this fascinating. It's one thing to see an expanse like this in media or tv shows, and another thing entirely to be standing on the rocks while the waves crash against the shore. She's idly sort of walking, not paying much attention-- until she spies Glacius' new form, and unknowing, lets out a squeak before clamping her hands on her snout. After a few blinks, though, she's putting two and two together.

"G-Glacius? Is that you??" She gapes a bit, not unkindly, but certainly surprised.