Alphys (Dinosaur/Scientist/Monster Girl/Otaku)

Based on the Monster Musume anime. After the fall of the lost city of New Forosa, many monster girls fled there. Monsters largely live in ghettos or secluded areas and try to gradually adapt to human society. But the process is slow and they suffer a lot of discrimination.

Alphys is a geek who really likes anime, with "Mew Mew Kissy Cutie" being her favorite. This is evident from the status updates she posts on Undernet during the journey through Hotland. She is very insecure due to the mistakes she made, such as the amalgams and Flowey, resulting in her believing that everything she does is a mistake or will go wrong. She stutters due to her insecurity and fear.

Alphys is apparently a kind of anthropomorphic dinosaur, probably a Triceratops, with light yellow skin. On her head she has three pointed spikes, simulating the crest of certain types of dinosaurs. She wears a white lab coat that reaches her ankles. Like dinosaurs, Alphys has a tail, but not a very long one.

Alphys isn't very tall; in fact, you could say she's the same height as Sans or Frisk, since their sprites are of similar heights. She wears circular glasses that completely cover her eyes. On special occasions, she wears a black dress with white polka dots that, like her lab coat, reaches her ankles.
She's quite insecure. She's an otaku and likes anime.