H2Olga is made up completely of light blue water, even her hair being a wavy blob of liquid. She wears a navy blue leotard along with some matching gloves and shoes finished off with a pair of goggles covering her face and a water cape along her back. Although she is a villain, she may not be a very powerful one since her main attack is shooting a small, low pressure stream of water. However, when given a large body of water to work with, she has the capability to control all of it.
H2Olga makes an appearance in Crime Wave. After the comic book became immersed in the bathtub water, H2Olga was able to use the excess bath water to flood the town of Chincinnati in the book. She then proceeds to go destroy page 8, which was where all the staples holding the book together were. As the water nearly engulfed the entire city, the Crimson Chin, who was babysitting a small toddler at the time, comes up with a plan after seeing the toddler's diaper, which said the words "Super-absorbent." The superhero then picks up the baby and put its diaper in the water, soaking up all the water, including H2Olga. While H2Olga was yelling about how she would get her revenge and get out of the diaper eventually, the toddler went number two, repulsing and making H2Olga scream in agony and disgust.