Supergirl dies in action in the ( Crisis) series- she is no longer a current charactr in the DC stable. It is true that Brainiac 5 (In Legion) seemed to have a crush on her, but knew this could not be consummated because she was doomed to die young. In other words, he knew in advance- Pit-falls of time travel/

No. The original Supergirl was created by Otto Binder and Al Plastino.

Super girl pretends to be Lana lang, reporter for the Daily Planet

They are essentially the same as her Male counterpart, but proportionate to a female. Her mental powers may be not only equal but more advanced- Supergirl was able to hypnotize Superboy ( her future uncle) to forget everything that happened at Legion meetings in the future- this was shown in Adventure Comics. Supergirl has a deep and abiding love of animals- and even when dealing with dangerous creatures is reluctant to cause them harm- for example in one accident involving sharks she used a modulated form of heat vision to warm the water and cause the sharks to move away from the movie set- rather than more violent measures-She is a lover of animals, and this is reflected in her two erstwhile pets Comet, the Super Horse- and Streaky the Supercat! the latter fine comic relief!

yes