Maya Hansen is the (former) hidden quaternary antagonist of Iron Man 3. She was the botanist of Aldrich Killian and helped him in his evil plan.
She was portrayed by Rebecca Hall.
She actually met Tony Stark in 1999 on Switzerland at the new year evening event (the event where Tony met for the first time Aldrich and from there Killian's entire plan started).
At the present day, she met Tony again and Pepper Potts at Tony's house. There, she wanted to talk with Stark in personal meeting but after Killian's main henchman, Eric Savin, arrived to the place with 5 armed helicopters and finally attacked Tony's house and during the assault, Maya fell asleep and woke up after the attack.
She died after Tony met Killian and Killian finally exposed his plan to Stark and then Maya refused to help Killian and wanted to kill herself by injection to her neck something who actually kills every Extremis henchman, but then Killian pulls out his gun and shoots Maya which finally killed her.