Alphys

Alphys is a character in the 2015 video game Undertale and the 2018 video game Deltarune. She is a bisexual reptilian monster who serves as the royal scientist under the leader of the Underground, Asgore, and is a fan of anime and manga. She is friends with Mettaton, a robot, and the captain of the Royal Guard, Undyne, who in the True Pacifist route becomes her girlfriend. She lives with social anxiety and depression, and the depiction of her struggles with these have been the subject of praise and commentary by critics. She watches the player-character throughout the game, offering guidance at some points, though with limited benefit. She is revealed to have dark secrets, including ones that relate to experimentation. She also appears in Deltarune as a school teacher.