Ms Rivet (temp name)

This Magical Girl was inspired by the Rosie the Riveter from the "We Can Do It" poster. Luey found her fixing a broken motorcycle and was impressed with her inginuity and decided to recruit her to the team.
Her transformation is a bit of a oddity when compared to others. Where usually the user of the magical crown gets a dress when they transforms, her "dress" is actually a large suit robotic armor she summons in a pinch.