The Birth: An artificial being, created in a pocket universe, this blue-eyed blonde came to Earth and was raised by the Kents after her own planer was destroyed. It was only after she left Superman's family and set out on her own did she adopt the guise of Supergirl. Her first documented appearance is recorded in Superman #16 (April,1988).

The Alter Ego: Supergirl's real name is Matrix ("Mae"). But now she hardly ever uses that name. Resting within Matrix, is Linda Danvers,with whom Matrix had fused with. Linda Danvers came from a normal middle class family.

The Legend: Matrix was raised by the Kents on their farm in Kansas. She is one of the few who know Clark's secret.(See Superman). For a time she and Superman shared a common mind link, and during that time she went out thinking she was the Big Blue himself, and tried to help out he people, causing more damage then help. Later on, she adopted the guise of Supergirl and set off on her own.
Supergirl was involved with young Lex Luthor II (See Lex Luthor)for some time, till she realized what a fool she had been. Apparently Lex had maintained his relationship with her by keeping her in the dark about his nefarious activities.
It was when she came upon the dying Linda Danvers that her life changed dramatically. Linda had been injured in a cult ritual, and having sworn an oath to Linda's parents that she would save their daughter, Supergirl sacrificed herself by merging her protoplasmic body with Linda's.
The blending created a new and unusual entity. However, for Linda Danvers, who had fallen far from grace, it was an entrance into a world seen through the eyes of a being who only looks for the best in others. For Supergirl, it was a connection to humanity and the granting of a human soul - albeit a dark and flawed spirit which she was able to redeem through great effort.
Together, they are a new and powerful incarnation that is, quite simply, an earth-born angel. An angel on earth with wings of flame, serving to protect the interests of both mankind and God.
Her powers include super-strength, super speed, flight and telekinesis.