Today’s useful phrase is, ‘Who is...?’
This is used to ask about the identity of someone.
This can be used when you want to know who one person is or multiple people.
A: Who is that man?
B: That’s the new section manager, Mr. Tanaka.
A: Who is your favorite actress.
B. Ishihara Satomi. I love her.
A: Who is coming to the beach with us?
B: My sister and a couple of her friends.