ultimatekeeper
nounUK /ˈʌltɪmətˌkiːpə/
US /ˈʌltəmətˌkiːpər/
The ultimatekeeper is the person who takes care of something better than anyone else.
She is the ultimatekeeper of the class pet, feeding it every day.
OTHER MEANINGS
2. The final person responsible for guarding a special object or secret.
The ultimatekeeper of the treasure never told anyone where it was hidden.
3. A title for the best player at protecting the goal in a game.
Our goalie was named the ultimatekeeper after saving every shot.
4. Someone who remembers and protects a family's stories and traditions.
Grandpa is the ultimatekeeper of our family history.