Here's why:
* "Bien" means "well" or "good" in Spanish.
* "Mireina" doesn't exist as a word in Spanish. It could be a misspelling of "reina" which means "queen."
* "Y tu" means "and you."
Therefore, if we assume "mireina" is a misspelling of "reina", the phrase could potentially mean:
"Well, queen, and you"
However, this sentence is incomplete and lacks context. It's unclear what the speaker is trying to convey.
To get a more accurate translation, please provide more information about the context in which you heard this phrase. For example, what was the conversation about? Who said it and to whom?