Brainiac's Daughter is a character from the alternate future of Kingdom Come. Born to two members of the Legion of Super-Heroes, Brainiac 5 and Supergirl, she traveled back in time and joined Superman's faction.
Brainiac's Daughter was created by Mark Waid and Alex Ross, first appearing in Kingdom Come #2 (1996).
Prime Earth
Daughter of Brainiac
DCAU
Justice League Adventures