4Arms (Chaquetrix / Alien Monster Girl)

Because she is a pure Tetramand, 4Arms is indistinguishable from an average female Tetramand. She has red skin and naturally black lips. She has four completely yellow eyes and long dark brown hair, which is tied in a ponytail held by a seemingly metallic bracelet. She has a muscular build and four equally built arms. 4Arms completely lacks a nose or ears, and has four fingers on each hand and two on each foot.

In the Classic Era, it appears to have a metal accessory in the shape of a crown on its forehead. It wears a dark blue suit with a vertical white stripe running down its chest and matching fingerless gloves on each hand. The Chaquetrix (Prototype) insignia is on its upper right shoulder.

She's a beautiful alien tomboy.

4Arms is a warrior who enjoys the thrill of battle and demonstrating her strength. During her fight with the resurrected mammoth, she smiled at having an enemy with whom to exchange blows. She enjoys testing her strength and limits.

She is formal when addressing others, referring to both Ben and Gwen by their full names.

She seems to have an instinctive understanding of combat, as demonstrated when she was thrown into the air and then converted her momentum into a fishing move.