It wasn't Dum-E that let her in in the first place, but he was the first one to greet her, whirring from his enforced guard-duty by the door and wearing a sash that read 'HALL MONITOR'. It was a demeaning position, or that was the intention, if anyone who happened to see him knew the levels of security that kept this place locked down without Dum-E's inquisitive clicking at the visitors. It was the disembodied voice of the lab that responded in a language Wicked was familiar with, noting, "Mr. Stark will be right with you. He suggests that you avoid touching anything." It must have sounded much less polite coming from Tony himself.
The voice wasn't lying, anyway; shortly, Tony came bounding down the stairs to meet Wicked, two at a time, padding softly when he started on bare feet and ending on the landing with a clank of Iron Man's boots as his clothes shifted in his descent. He made eye contact before he could form the helmet, making the motion abort sheepishly, armor wrapped up to his chin then smoothly back into his hairline. "Hey, everything okay?" he asked with concern, not sure what to make of an unannounced visit but erring on the side of imminent disaster. A bit of that seemed to be going around, and he hadn't seen Wicked since...well, the last really major one. It could be habit forming.