As a harpy, she had white feathered wings instead of arms that fade to light green at the edges, talons instead of feet, and a tail. She had the build of an average human, but her long legs made her much taller. She had long, wavy, light green hair and brown eyes. In the anime, her eyes are amber. She was also considered very attractive as several Marines commented on her appearance.

She wore a green cropped tank top with "HAPPY" written in dark green on the chest and yellow cut-off pants with orange stripes. She had a Baby Den Den Mushi strapped to her belt.

She was usually seen wearing glasses while reading, implying she was farsighted. The glasses have circles in a ripple pattern on the lenses, giving the appearance of thick spectacles.

Monet appeared to have a very flippant personality, choosing to only inform Caesar about the disaster unfolding on Punk Hazard, after finding out that the intruders were you Despite all of the uproar, she maintained the thrilled smile on her face, implying she found it amusing.

While fighting foes that are more powerful than her, she will use cunning tactics to gain an advantage or attack foes that are weak. If she has control of the situation, she displays a confident demeanor. However, Monet can be overconfident, which results in her underestimating her foes.

She could also be rather flirtatious, such as when she’s commented on her looks and being told of her beauty, she bashfully blushed despite the serious situation. She also tried to cover herself with her wings and her knees buckled as well, suggesting she was rather shy to compliments.

Observing the surroundings of Punk Hazard, Monet hovered in the air using her harpy wings and the cold environment didn't bother her much, yet soon her attention would be drawn to a familiar figure she thought she recognized, marching through the snow, decked in snow gear as she soon flew down to get a closer look.

“No…could it be..?”