Alphys is a huge nerd. Does that mean shes going to take her time off of being Head of the Royal Guard to watch anime?

Yep.

She doesnt notice youre location in Lavafall until you are about halfway through. She is very tough, making her the perfect Royal Guard Head. Shes rather brutal at times, but when it comes to Mew Mew. She'll stop fighting for that any day.

She must fight you to get your soul. She has saved the sharp end of her axe for the last human needed. She used the other, dull, beat-up side on the ones who passed by Lavafall.

When in Genocide, attacking Asriel will cause Alphys to leap in front of him. Alphys, through HEROISM, becomes Alphys the Alpha, and fights vigorously. She eventually melts from the extreme power of HEROISM.