Undyne is the Royal Scientist, and a major character encountered in TS!Underswap.
Undyne is a blue fish monster with red hair and gills. Her hair is tied up behind her and boots a red, robotic eyepiece over her left eye. She wears dark pants, a red scarf, and a black lab coat, with the right sleeve is cut at the shoulder and equipped with a shoulder pad. Undyne also wears a technologically-advanced gauntlet on her right hand, increasing her strength. She sometimes wears a face shield for welding with a light hanging over the top, slightly resembling an anglerfish.
Undyne's personality is mostly that of her counterpart in Undertale, albeit naturally with an increased intelligence and knowledge of robotics. She designed her gauntlet with the intention of enhancing her strength, so that she can 'punch even harder than ever before'.
- In addition to being the Royal Scientist, Undyne owns the company "Undying Robotics," which is funded by the royalty. 
- Progress Report - March 2021 (Teasers, Design Reveals, and More!) - Official Team Switched GameJolt Page
- So Napstablook's name is Sir Scratchalot? And Undyne started a company?! Whoa! - Official TS!Underswap Tumblr