If you're referring to her as a religious figure:
* Sœur Marie: This literally translates to "Sister Mary," which is the common way to address nuns.
* La Sœur Marie: This is a more formal way of saying "Sister Mary."
If you're referring to Mariah as a sister in a family:
* Ma sœur Mariah: This is the most direct translation, meaning "My sister Mariah."
* Mariah, ma sœur: This emphasizes the familial bond, meaning "Mariah, my sister."
* La sœur de Mariah: This is a more formal way of saying "Mariah's sister."
If you're referring to her as a close friend:
* Ma sœur de cœur Mariah: This means "My sister of the heart Mariah," indicating a very close friendship.
* Ma meilleure amie Mariah: This means "My best friend Mariah."
The best way to translate "Sister Mariah" depends on the specific context and the relationship between the speaker and Mariah.