At this moment, cheer on now, if you are thinking sovereignty became your jailor instead of your gatekeeper.
From the economist.com
The facility has many fine amenities for the aspiring jailor, including 38 buildings, an onsite water distribution system and two basketball gyms.
From the huffingtonpost.com
He drew from his own experiences with an ex-girlfriend, whose previously abusive relationship inspired Elizabeth's struggle with Songbird, her monstrous winged jailor.
From the sacbee.com
During his brief detention, he occupied himself in preparing an edition of Eadmer's History from a manuscript lent to him by his host or jailor, which he published two years afterwards.
From the en.wikipedia.org
More examples
Prison guard: someone who guards prisoners
A corrections officer, correctional officer, detention officer, prison warder, or a prison officer is a person charged with the responsibility of the supervision, safety and security of prisoners in a prison, jail, or similar form of secure custody. ...