"Cyosphere, Serial number Mighty No. 2, is the second robot in Dr. White's Mighty robot line. She is one of the two female Mighty Numbers, along with Dynatron
Cryosphere is based off of the old British diving suits. She has a hose output valve for her right hand, and an input valve for her left hand. She has a large tank on her back to store water. When the tank runs out, she can attach her left arm to a water output valve to refill her tank."

~Quotes taken directly from the Mighty No. 9 wiki