IPA: /huː/
KK: /hu/
This word is used to ask about the identity of a person or people, or to refer to someone previously mentioned.
Who is coming to the party tonight?
The word 'who' originates from Old English 'hwā', meaning 'who' or 'which person'. It is used to inquire about the identity of a person.
Think of 'hwā' as a way to ask about someone's identity — that's why 'who' is used to inquire about a person.