Q: When Sue went to Nadia's home for dinner, she told the security guard to let her in.
Who she is?
A: Sue

Q: Clark Kent hides his identity from Lex Luthor since he wishes to keep his loved ones safe.
Who he is?
A: Clark Kent

Q: Misty was replaced by May because she had to go back home.
Who she is?
A:
Misty