It was just a moment, but the second that Mikasa heard the suit fly in she leapt to defense without thinking about it. She whirled gracefully one on foot, her blades drawn across her in a protective, defensive position. Her stance was that of at ease, yet her body posture showed fierce attention on the approaching danger. When she recognized Tony's voice after he opened the faceplate, Mikasa lowered her blades and tucked them back in to her gear. "They are subdued for now," she reported coolly.
She still didn't really know what to think of this man, this Iron Man. He was a genius, of that much she knew. A crazy genius at that. For someone to want to jump into the thick of things and attack and capture Titans live just like that, he would have to be crazy. But, there was a fine line between crazy and genius. From what she knew of him, he was more the genius than anything. Innovative and brave, too, at least in Mikasa's opinion.
She had rested here, in the presence of the Titans, not wanting to let them leave her sight. Had they come here because of her? Tony's comment that this wasn't her fight alone had resonated with her. He was right: everyone was involved now. However, that didn't change things. They were still creatures from her world, creatures set to destroy humanity. She knew the most about them here and she also knew that if these two were to escape, she could kill them both with ease. She wasn't as talented as Captain Levi when it came to the killing stroke, who's attacks could take out dozens of Titans without much effort. But, she could handle her own.