Does Jemma Simmons have powers?

She has gained certain abilities like: Super-Strength: Jemma has been shown capable of breaking down metal doors and swiftly knocking down S.H.I.E.L.D. agents with one arm.

What did Jemma Simmons do?

Upon graduation, she applied to work for the American intelligence organization S.H.I.E.L.D. and was welcomed into its ranks as an agent. Unfortunately, though Simmons loved her work with S.H.I.E.L.D., while on a mission she was exposed to a substance that led to her becoming a cyborg in order to save her life.

Why did Jemma Simmons join Hydra?

She was recruited by Agent Phil Coulson to be a part of his new team along with Leo Fitz. She was brought on board because of her expertise as a biochemist.

Why did Jemma leave Fitz?

She eventually tells Mack the reason she left was because her presence only made Fitz’s condition worsen and she was trying to help him get better.