Daria is a recent immigrant who married someone from the dominant ethnic group.She is exhibiting assimilation.

Assimilation

The process by which individuals or groups of differing ethnic heritage are absorbed into the dominant culture of a society.

Dominant Ethnic Group

Refers to the ethnic group in a society that has the most power, influence, and resources, often setting norms and values for the broader community.

Recent Immigrant

An individual who has moved to a new country from their place of origin relatively soon before the present time, adjusting to a new culture and environment.