"Yeah," Olivia said through a deep breath.
She held her hand out in front of her and watched, looking almost bored, as what looked like liquid metal began consuming it. The shining silver substance ran down her wrist like water, eventually coating her entire hand and, despite how it looked, she curled and flexed her fingers unhindered. Nina jumped slightly as blue sparks began jumping across the back of Olivia's hand, electrifying the air around them.
Nina's heart was pounding, her eyes wider than they had ever been. Her entire body tensed and her own voice was screaming inside her head. She jumped again when a whooshing sound came from her left. She turned quickly to see Katerina holding up her hand, which was concealed within a blazing orange flame, regarding it with a frown.
Slowly. Calmly. Nina pressed her palm against the smooth, warm stone floor of the roof. Adrenaline coursed through her veins as she gradually lifted her hand straight up, everyone watching as a trail of stone came with it. As she lifted her hand higher the stone sculpted itself at her command, curving, thinning, widening, until she was holding a thin blade resembling a throwing knife. Looking at the tile she had drawn it from, there was no evidence that any stone had been displaced. It was almost like she had created it from thin air.
There was another deafeningly silent pause in which Nina thought she might actually be going into cardiac arrest.
"Yes!" Suddenly, Nina found herself on her back. Olivia had knocked the wind right out of her and the knife in her hand went sliding across the rooftop. "Yes!" Olivia screamed again, lifting off Nina just enough to take her face in her hands and kiss her all over. All Nina could manage to do was screw up her face and take it. Meanwhile, Katerina had started laughing. She was in such disbelief it was all she could do.
"Oh my god," Olivia jumped to her feet just as suddenly as she'd tackled Nina. "This changes everything," She ran her fingers through her short hair, pacing a few feet away from where Nina was pushing herself up on her elbows.
"I have to call my dad. I think we'll have to share a room at the Tower. You could sleep in one of the empty ones I guess, but if someone visits-" She cut herself off, bringing her hand up to her mouth, looking deep in thought.
"What are you talking about?" Nina asked, bewildered.
Olivia rushed back over to her, pulling her up by the hands.
"You have to come with us! You live in Brooklyn, right? That's not far. You can keep going to school. You do go to a local university, right?" She didn't wait for an answer. "I know you care about your dad, and shit. You can still see him whenever you want. And, fuck it, take Thor's room. He's never around," She kept on talking, but Nina stopped listening.
"What? Hey, hey, hey," Nina grabbed the babbling woman's shoulders. For a second she though she was going to have to slap her to get her to stop talking. "Thor? What...what the fuck are you talking about?" Her currently very tired brain wasn't putting the pieces together fast enough.
"The Avengers!" Olivia's very enthusiastic answer didn't prove to help much.
"Wait, wait," Nina put her hands on the sides of her head and closed her eyes.
Olivia's dad is Tony Stark. Tony Stark is Iron Man. Iron Man is an Avenger. Thor is also an Avenger. Olivia and Katerina have super powers and Avengers connections. She said something about "the Tower". Stark Tower is the Avenger's headquarters, which is in Manhattan…
"Oh my god," Nina opened her eyes as things fell into place. "You're gonna...you're gonna have to explain this to me," Olivia opened her mouth to talk, but Nina turned away from her.
"You," She pointed to Katerina, who had also stood up by then.
Turns out, unsurprisingly, it was a long story.
Katerina had been born with her abilities. She'd hidden them until the last year or so, loosing control infrequently enough to have kept attention from herself. Olivia, on the other hand, obtained her abilities due to a combination of her own reckless rebellion and her father's seemingly uncontrollable impulse to tinker with things he shouldn't. Tony Stark couldn't well allow his super powered daughter to run around without some kind of understanding of her abilities. So, he did the most obvious thing and locked her up in Stark Tower with multiple super heroes to teach her restraint and control. Katerina, after escaping her unstable uncle, was soon to follow.