Dr. Xenon

Dr. Xenon is the main antagonist in the hit Roblox game Tower Defense X. She is an Engineer and Robotics Designer, however she's not that good with preventing the cores of the robots from overheating, as when you defeat the Eradicator MKII, before he can fly away, both his arms blow off, then his head explodes. The Eradicator MKI Combat at least gets in the air before its core explodes. She wants to take down GDA (Global Defense Army) for an unknown reason. Her main enemy is the commander (the user) John (The head of GDA, and creator of the game), and the Advisor.