Lucy Lane

From Superman Wiki

Lucy Lane is the daughter of Sam Lane and the sister of Lois Lane. Unlike her sister, Lois, she's blonde.

In her young adulthood, she spent a lot of time with Lois in Metropolis, where she also dated Ron Troupe for a while. She later came to see this as a sign of weakness in herself, as she felt it was only an attempt to get closer to Lois.