Blackarachnia

   Blackarachnia did not appear until sometime into the show, Beast Wars.  Once she had made an appearance, she was taken by the Predacons.  Here, she flourished as one of the smartest of the bad guys, and often helped Tarantulas in his schemes to overthrow Megatron.  However, she fell for a Maximal, Silverbolt, and eventually switched loyalties.  After  she is injured in an accident with the transmetal sphere she stole, Rhinox performs an emergency operation.  The operation is mottled by a missile from Tarantulas, putting the robot off-line.  Silverbolt goes loco and flies off to find the other spider-bot, leaving Blackarachnia's body alone.  The transmetal sphere somehow lifts off the table and brings her to life, plus turning her transmetal.

Cool Stuff on Blackarachnia

Blackarachnia's voice actress (Venus Terzo) also did one of the Hero Selective, could be any of the girls except Pixel.