Alphys in FellSwap: Gold is shy, socially awkward, and introverted. Due to her shyness, she wears a black mask around her mouth. She is a Lizard Monster who lives in Waterfall. She has a crush on Undyne, the Royal Scientist, but is too shy to tell her that out of fear of ruining their friendship. She can play the guitar. She has a brown acoustic guitar and a red-and-white electric guitar. She likes playing her guitar. It helps her express herself. She is the Royal Guard Lieutenant.