What are Supergirl?

Answer 1

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!

Answer 2

She doesn"t use weaponry. She had ( poor girl is dead) the same basic superpowers as her cousin, possibly enhanced hypnotic and mental powers as she could hypnotize superboy so he would not recall Legion Meetings with her. ( note the time travel aspect) Brainiac-5 had a literally dead-ended romance with Supergirl, but was aware of her premature death.