Atom Eve from Invincible both base and armored
Honestly, I dislike around 90% of the costumes designs in Invincible. Most of them never really feel like their own designs, they look like Temu versions what Superheroes are, even original heroes. Eve's costume is probably my favorite. Simple, cute, and pink.
It complements her powers which are also pink, and she has a pretty unique look among everyone else. Her shorts and little cape make her stand out.