[Alphys tries to smile, keep it together, but... Toriel doesn't recognize her. Which is fine, they only met once, but... maybe that's not it. Time to feel this out.]

Oh, uhm, I'm Alphys. I uh, I d-don't think we ever met, but uh... I was uhm, the Underground's r-royal scientist. For, uh, Asgore. I've, uh, h-heard a lot about you, and uhm... well, you're pretty recognizable!

[She hopes she doesn't look as awkward as this feels. Oops.]