She blinked. "I'm working for an informant who needs info on the building." It wasn't a complete lie. Every once in a while, Yuuhei set up things to make her curiosity purr, and wound up sending her on unintentional jobs on gathering info. When she's come back, he'd interrogate her.
She showed him the small camera that she had stashed in her pocket. "He sent me, because I take the best pictures." She smiled lightly, then made sure that nothing in her backpack had broken. Then, she looked back at the ladder. It was rusty, yes, but it should have held her weight.