|Manner of Death:||Shot in the head by Detective Enger|
|Affiliation:|| Proletheans (formerly)|
|Significant Other/s:||Mark Rollins † (husband)|
|Family:|| Henrik Johanssen † (father)|
Bonnie Johanssen (mother)
Abel Johanssen † (brother)
Mark Rollins † (husband)
Unborn child † (surrogate for Henrik and Helena/paternal half-brother; miscarried)
Donnie (half-brother; via Henrik and Helena)
Arthur (half-brother; via Henrik and Helena)
|Portrayed by:||Zoé de Grand'Maison|
|Season/s:||2, 3, 5|
|First appearance:||"Governed by Sound Reason and True Religion"|
|Latest appearance:||"Guillotines Decide"|
In "Mingling Its Own Nature With It", Gracie continued to doubt her father's plans for Helena to "join the family". However, following Henrik's brief talk with Gracie, Gracie decided to conceal her dislike for Helena. She continued to see her with increasing distaste for Helena, even going as far as to refer to her as 'it'. Henrik married Helena thereafter.
In "Governed As It Were By Chance", Gracie attempted to smother Helena while serving her food, after which Helena returned the favor and suffocated Gracie, but only enough for her to fall unconscious for a short period of time.
In "Ipsa Scientia Potestas Est", Gracie was confined in a cell for her part in Helena's escape. Refusing to tell them anything aside from insisting that Helena simply attacked her, Gracie's lips were literally sewn shut by her parents. Mark visited her, expressing his desire to help her. Later, she is convinced to finally confess what she did and asks for her father's forgiveness.
In "Things Which Have Never Yet Been Done", both she and Helena are implanted with Helena's eggs, fertilized in vitro with Henrik's sperm. Thus, she was impregnated and unwillingly became the surrogate carrier of Helena and her own father's child.
In "By Means Which Have Never Yet Been Tried", she and Helena were locked away until Mark arrived and freed them. Later, she and Mark were wed.
|Season 2 appearances|
|Nature Under Constraint and Vexed||Governed by Sound Reason and True Religion||Mingling Its Own Nature With It||Governed As It Were By Chance||Ipsa Scientia Potestas Est|
|To Hound Nature in Her Wanderings||Knowledge of Causes, and Secret Motion of Things||Variable and Full of Perturbation||Things Which Have Never Yet Been Done||By Means Which Have Never Yet Been Tried|
|Season 3 appearances|
|The Weight of This Combination||Transitory Sacrifices of Crisis||Formalized, Complex, and Costly||Newer Elements of Our Defense||Scarred by Many Past Frustrations|
|Certain Agony of the Battlefield||Community of Dreadful Fear and Hate||Ruthless in Purpose, and Insidious in Method||Insolvent Phantom of Tomorrow||History Yet to Be Written|
|Season 5 appearances|
|The Few Who Dare||Clutch of Greed||Beneath Her Heart||Let the Children and Childbearers Toil||Ease For Idle Millionaires|
|Manacled Slim Wrists||Gag or Throttle||Guillotines Decide||One Fettered Slave||To Right the Wrongs of Many|