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Official Site: ABC

Jemma Anne Simmons is a fictional character that originated in the Marvel Cinematic Universe before appearing in Marvel Comics. The character, created by Joss Whedon, Jed Whedon and Maurissa Tancharoen, first appeared in the 2013 pilot episode of Agents of S.H.I.E.L.D. and has continually been portrayed by Elizabeth Henstridge.

In the series, Simmons is one of S.H.I.E.L.D.'s top scientific minds. Though her experience is vast, she is particularly expert in biological sciences. Many of her storylines involve her relationship with her best friend, and later husband, Leo Fitz. Over the course of the series, she develops from a relatively young and inexperienced S.H.I.E.L.D. scientist to one of S.H.I.E.L.D.'s most senior agents, also clocking significant experience as a field agent. She is distinguished from her colleagues by taking very determined and sometimes coldly rational decisions in the pursuit of what she believes is right.

In season one, Jemma Simmons is brought on to S.H.I.E.L.D. agent Phil Coulson's team as a life sciences (both human and alien) specialist. She has a close bond with fellow agent Leo Fitz, whom she met at the S.H.I.E.L.D. academy, with both being its Science and Technology division's youngest graduates. Near the end of the season, Fitz and Simmons lock themselves inside a medical unit for safety from rogue agent Grant Ward, who ejects the unit into the ocean. Trapped on the ocean floor, Fitz and Simmons send out a distress signal, and devise a controlled explosive to blow the windows open and escape. Fitz forces a distraught Simmons to take the sole oxygen tank, professing his feelings for her. He is nearly drowned after using the explosive, while Simmons swims to the surface with his unconscious body, where they are rescued by Nick Fury, who picked up their distress signal.

In season two, following the underwater experience, Fitz struggles with technology and hallucinates the presence of Simmons, who left S.H.I.E.L.D. some time earlier because of Fitz's condition. However, it is later revealed that Simmons is working undercover within Hydra. Her identity is exposed, but Hydra security chief Bobbi Morse, another undercover S.H.I.E.L.D. agent, rescues her and Simmons reunites with a recovering Fitz. Near the end of the season, as Fitz arranges for a date with Simmons, a Kree weapon called the "Monolith", which is in S.H.I.E.L.D. custody, breaks free of containment and absorbs Simmons into itself.

Jemma Simmons has not been a contender in any CBUB matches.