La Asesina del Emperador, la madre de Ben... Mara Jade Skywalker
Yep! EU should definitely be canon.... The legacy of the force was an amazing book series!
Sith Bushido: Mara Jade by ManBean on DeviantArt
Mara Jade - Swarm War
Mara Jade eventually abandoned the Empire to marry Luke Skywalker. Together, they foster Daphne's daughter Kee Skywalker.
Mara Jade is The Emperor's Hand
Mara Jade by ~nbashowtimeonnbc on deviantART
Mara Jade by ~SketchyMcDrawpants
Mara Jade, the Emperor's hand!