Hello, I'm an expert in comic book lore and superhero narratives. Let's delve into the relationship between Supergirl and Superman.

Supergirl, whose real name is Kara Zor-El, is not Superman's daughter. Instead, she is his cousin. Both characters originate from the planet Krypton, and they share the same biological parents, Jor-El and Lara Lor-Van. However, they were sent to Earth at different times and under different circumstances. Superman, also known as Kal-El, was sent to Earth as an infant, while Supergirl was sent later after Krypton's destruction, making her his younger cousin in terms of their arrival on Earth.

read more >>

Like the pre-Crisis version, this Kara claims to be the daughter of Superman's uncle Zor-El and aunt Alura In-Ze. Unlike the traditional Supergirl, Kara is born before Superman; she is a teenager when he is a baby.read more >>