(So for the "getting caught," since this is based off of Marvel, I'm thinking a "hydra-like" organization takes them to experiment, like Wanda and Pietro, but while they're there, the siblings have a "moral epiphany," for lack of a better term)
A wicked grin came over Farah's face. Her eyes followed the twister, and she lifted a hand to her face to shield herself from the whizzing water droplets the tornado dispelled across the city. "It's beautiful," she whispered.
After a moment more of watching it, Farah turned and began to walk toward the door leading to the building's staircase. "Great job, E," she said into her earpiece. "I'll be right down–"
Suddenly, she walked right into someone. She jerked back in surprise, which gave the darkly-clothed figure enough time to strike her across the face. Farah cried out due to the shock and fell back, scraping her hands against the concrete rooftop to catch herself as best she could. She tasted blood dripping into her mouth, and she automatically lifted her fingers to her face to touch below her nose. When she pulled her hand away to observe it, the tips of her fingers were stained red. Yep, nosebleed. Her eyes quickly darted to the person who'd hit her. "What the hell?" she spat.