Who is she? — She is Oleg's grandmother.
1. Who is he? — He is Olga's father.
2. Who are they? — They are Stepan's sisters.
3. Who is she? — She is Vera's mother.
4. Who are you? — I am Lena's brother.
5. Who are you? — We are Anton's friends.
6. Who is he? — He is Vlad's uncle.