Bending? That's what this was about? The man wanted Zuko to bend? Katara's rage seemed to rise even higher, her blue eyes all but glowing as she glared openly at the man responsible for all of this. Her lips pressed into a thin line as she regarded him silently for a moment. Then she jerked her arms upward, stepping toward him, and sent a rush of water directly toward the scientist.
It swept him off his feet and out of the room, slamming him into a large pillar and freezing in place, holding him there. A sound that was a mixture of a shout and a growl crossed her lips as long, sharp icicles shot from her fingers and embedded themselves into the thick concrete in an outline around the man's head.
Already Katara was out of the room that had been Zuko's prison and moving toward her own prisoner, her face twisted in hatred. "Seen enough?" she snapped, only hesitating when Cordelia's voice rang out from somewhere behind her.
"He's a crazy person, Katara. You can't kill him."
The words made her stop, although she continued to glare at the professor. "He would have killed Zuko," she finally spoke, her voice only a modicum calmer.
"But he didn't," Cordelia replied evenly, glancing to Zuko before looking back to the waterbender. "He's human, Katara, and he's unarmed. I can't let you kill a helpless human." There was a twinge of regret in her voice, but she wasn't going to change her mind. He couldn't defend himself. Therefore, he couldn't die.
Yet already, water was starting to churn around the young woman's clenched fists, the very air around her seeming to grow damp as she struggled between what she knew was right, and the retribution she sought.