Atom Eve's transformation after weight gain is visible to all manga and anime viewers. Her weight gain was due to her refusal to use her powers, as her power used to burn a lot of calories.
Invincible: Atom Eve is a television special that acts as a prequel to the Invincible animated series. It covers Atom Eve's origins and how she became a crime fighter. The show puts players in the shoes of the titular superhero, Atom Eve, who is out flying when she notices a peculiar green light. However, before she can properly explore, an old foe named Killcannon stands in her way. The tutorial battle opens with Eve flashing back to an earlier confrontation with Killcannon, which led to her joining a new superhero squad called Teen Squad, led by the aptly titled Robot.
Eve succeeds in the end, but the green light haunts her thoughts. She fits in so well as a superhero that she offers to assist in the training of the newcomer, Invincible. Although it is an anime series released on Prime Video, fans have noticed the main character's weight gain. So why did Atom Eve gain weight?
Atom Eve’s Refusal to Use Her Powers Led to Her Weight Gain!
Atom Eve has indeed gained weight, and many manga readers and anime watchers have discussed her weight gain. As Mark continues to help with the cleanup, she offers that they increase their ranks for their work program, feeling Oliver would be a good fit. Later that night, she takes a pregnancy test, which comes out positive. Several months have passed since then, while Mark remained in space during the Viltrumite War story arc. So was her weight gain the reason for her pregnancy?
Atom Eve has gained a huge amount of weight.
Ten months later, Mark returns to Eve. During that time, Atom Eve had gained weight, but it's important to say that it was not due to pregnancies. Yes, she was very fat and looked very different than she was before her weight gain. Her weight gain was due to her refusal to use her powers, and because she was not using her power, it led to her transformation, as her power used to burn a lot of calories, but her refusal to use power didn't help in burning calories, leading to her weight gain. Her character change and her transformation have been discussed over the internet.
Many people disliked her weight gain; however, some Reddit users admired her transformation. Not because they appreciated her appearance, but because it added dimension to Atom Eve. Her gaining weight by doing nothing was a reasonable response to Mark's departure to fight the Viltrumites. It helped to flesh out her character. I don't see why people don't like it because it modified her character design. It made sense for the tale and gave Eve and Mark a more human appearance.
A Description About Atom Eve’s Power!
The story does an excellent job of putting you in Atom Eve's shoes while still giving her a distinct personality. It delves just enough into plot exploration to keep you interested, even if you aren't a huge fan of the series. She grew up with harsh and rigid parents who never tried to understand her, so she became a single hero before joining Teen Team with her possible boyfriend, Rex Splode, and Dupli-Kate. She fits in so well with the superhero world that she offers to train newcomer Invincible, who happens to be one of her fellow high school students named Mark.
Atom Eve possesses the power to modify and restructure matter at the subatomic level.
Source: BULK UP
As per her wiki, through pure willpower, Atom Eve possesses the ability to modify and restructure matter at the subatomic level. She can convert everything she knows how to make into something else, and because she was formed with a tremendous understanding of chemistry and the molecular structure of things, as well as an instinctive knowledge of every scientific law, her skills are only limited by her creativity.
She has the ability to transform biological (but not animal) and inorganic matter, to make atoms obey her will, to create new atoms and sophisticated forms of life out of non-living matter, to fly by lowering the density of the air around her, to build force fields, and to shape energy to make any item she can imagine. Her clothing is made by refashioning her clothes into the Atom Eve suit. She can transform generally unhealthy items like cakes and other sweets into nutritional dishes while also rearranging the environment.