Supergirl by Peter David Book 2

As Supergirl tries to get used to her dual life, she is confronted by villains like Silver Banshee, Despero, the Extremists and many more. Her biggest challenge: telling the Danvers and Kents about her powers. With everything changing, Supergirl undergoes an angelic transformation. Collects issues #10-20 and SUPERGIRL ANNUAL#2.