- Leo Fitz is as brilliant an engineer as he is socially awkward—but he’s always on the same wavelength as his research partner, Jemma Simmons. The two of them are an inseparable pair, though a little green, having never been in the field before.
Fitz is never seen separate from his partner, Jemma Simmons. The two often bicker, but are a great pair. Fitz is a highly intelligent engineer. He is somewhat clumsy and awkward around Skye and, sometimes Simmons.
- His current ID badge serial number is A 0947329; the card was issued on 5 February 2013, and will expire on 5 February 2018.
- Leo Fitz who is an original character, created for Agents of S.H.I.E.L.D., was adapted into the mainstream continuity, of Marvel Comics.