Keeper

In BDSM and kink, the term "keeper," has a few distinct meanings:

1. The Dominant role of the human pet keeper in a pet play. Similar to a Handler, but often with the added responsibilities of the owner role, and the inclusion of caging/confinement as part of the play.
2. The owner/operator/boss of a sex dungeon. More commonly referred to in whole as a Dungeon Keeper.
3. Someone who is both a Protector and Captor.
4. A pet name style role for a sexual partner willing to do anything to please you, thus being worth keeping around. Example: "That person will do anything to get me off; they're a keeper".