Curaré first appeared in the Batman Beyond episode "A Touch of Curare" (1999). She was later mentioned in Batman Beyond (vol. 5) #17 (January 2013):
And then appeared, but not literally, a few weeks later in issue 20 (March 2013).
Curaré made her first actual comics appearance in Justice League Beyond #21 (March 2013), where it was revealed she was the sister (or perhaps "sister") of Green Lantern Kai-Ro. She later appeared as a member of Justice Lords Beyond in Justice League Beyond 2.0 #19 (May 2014).