Iris watched the interaction between, yes that had to actually be Batman, and Gus, and it took a bit for her to catch up with what was actually happening. The conversation seemed to be overly serious, but she couldn't help but appreciate the sentiment, the caution to safety for the boy.
What she couldn't appreciate was the violence against Finch, even if the dog had attacked first. It was his territory, and Gus was his to protect. She moved finally to make her way back deeper into the room, ignoring what the Bat was telling her about weapons. She very carefully checked on Finch and then gathered Gus into her arms, holding him tightly. By that point, their "houseguests" had moved into the master bedroom, and after she reassured herself that both boy and dog would be alright, she told Gus to stay close to Finch, promised she'd be right back, closed the door and followed.
"Get out," she said, eyes hard on the figures in the room and voice laced with the sort of steel it didn't normally have. She didn't care any more that they were fictional or that one of them was supposedly a 'good guy' that she'd spoken with on more than one occasion. Right now they were intruders. And she wanted them gone. Both of them. "Get out now."