A quick sketch to demonstrate Jessie's stance when she fights and show how the inky limbs she forms look. These arms are used for counterbalance, preforming certain kicks, blocking, parrying, and getting her airborne. She could use them for punches, but she's not as comfortable with that fighting style
When she fights, she keeps her hands in her pockets because her arms don't provide enough weight to keep her balanced. Between her strength and the tungsten soles, she needed heavier arms

Fun fact, their appearance was inspired by the Jelleton from Splatoon 3: Side Order c: