Superman Inspires Batwoman

Batwoman only had two appearances before appearing in World's Finest Comics #90 (September-October, 1957) with a cover by Curt Swan and Ray Burnley.  

In those two previous appearances, Kathy Kane was a socialite that Batman felt was playing at heroine to try to figure out his identity, and, in those appearances, Batman tried as hard as he could to discourage Kathy from permanently taking up the mantle of Batwoman.

That changed after she helped the World's Finest Team.

The Super-Batwoman

With writer Edmond Hamilton (her co-creator), and artists Dick Sprang and Stan Kaye,  Batwoman shows up to help track down criminal Elton Craig (who had faced Superman, Batman and Robin before with pills that gave him super powers).  Escaping prison, Elton tried to track down the last of his pills, but Batwoman found it just before him, and to prevent him from taking it, she did!

Trying to prevent her from continuing, Batman tells Batwoman to go home.  Batwoman vows to spend her 24 super powered hours to discover Batman, Robin and Superman's identities. 

The trio keeps ahead of Batwoman (barely, including a visit to the Daily Planet by Batwoman, to see Perry White, Lois Lane and Clark Kent; as well as a Bat Cave). 

The boys do manage to hide their identities from her, but Batman backs down on his objections to Kathy being Batwoman.

Better still, this tale has been reprinted many times, including in the Giant World's Finest Comics #161, the second World's Finest Comics Archives, and in the first Batman and Superman in World's Finest Comics Omnibus and tradepaperback.

Batwoman then had many future appearances, usually with another member of the Bat-family (like Bat-Mite, Ace the Bat-Hound, or her niece, the Teen Titans' Bat-Girl) or even with Superman fighting Luthor in World's Finest Comics!