Alphys

Alphys is a fictional character in the video game Undertale, created by Toby Fox. She is the Royal Scientist of the Underground, a realm inhabited by monsters sealed away from humanity. She is a yellow, reptilian monster, characterized by her glasses, lab coat, and shy, anxious personality.

Alphys's role in the Undertale narrative is significant. She is responsible for the creation of the robotic character Mettaton, originally designed as a human-entertainment robot but later modified into a fighting form. A key element of Alphys's backstory and character arc revolves around her experiments with "determination," a powerful substance, resulting in the creation of the Amalgamates – monsters fused together in horrific ways due to the determination's instability. She conceals these experiments and their results, leading to feelings of guilt and self-doubt.

Throughout the game, the player encounters Alphys and interacts with her, often through Mettaton's television show appearances. Depending on the player's choices, they can uncover the truth about her past and help her confront her insecurities. Her storyline explores themes of responsibility, the consequences of scientific ambition, and the importance of honesty and self-acceptance. Her character is often seen as a commentary on anime and manga culture, as she is a passionate fan and incorporates elements of these media into her own inventions and personality.