Who are they?
They are the grandparents.
Who is he?
He is the baby.
Who is he?
He is the brother.
Who are they?
They are the parents.
Who is she?
She is the mother or mum.
Who is she?
She is the sister.
Who is she?
She is the grandmother or grandma.
Who is he?
He is the grandfather or grandad.
Who is he?
He is the father or dad.