Iri was making an effort to use her head more in the absence of her parents, who were not around to provide their usual guidance. With their absence, she felt a greater sense of responsibility to think critically and handle situations on her own. This was particularly important to her because she didn't want to add to Raiden's worries or burden him with additional concerns about her well-being.
Understanding that Raiden was already managing his own challenges, Iri was determined to be more self-reliant and thoughtful in her actions. She was aware of how much Raiden had to juggle and didn't want to become a source of stress or distraction for him.