Danielle Atron

Danielle Atron – The owner/CEO of the Paradise Valley Chemical Plant, and Alex's main nemesis. She is the main villain in the Secret World of Alex Mack. She wants to market GC-161 as a radical new weight-loss drug, and has made it her mission to find the GC-161 child (whom she does not know is Alex) and capture her, as both a test subject and a threat to the secrecy of her plans.

At the final episode, she finds Alex Mack. She and her henchmen tried to murder Alex and her family because they want to get rid of the evidence.

However, Alex, her family, and friends escape and they stop her from leaving. Danielle is arrested for her crimes.