Season 2 subsequently revealed that she was actually a latent Inhuman (the daughter of the supervillain Mr. Hyde) with vibration powers named Daisy Johnson.
“I think it makes her more ruthless being so close to what she thought was her own death.
Agents of S.H.I.E.L.D. is fundamentally an ensemble series, but Bennet’s character has served as both audience-surrogate and the focus of the series’ main mysteries and core story points.
Also, there’s a sense of sadness that was there that I tried to make apparent at the end of the episode.”