>>283061299
There's also the fact that she actually was pretty clever. Her bragging about being a genius was at least somewhat backed up, she was a font of good ideas throughout the manga and she kept an eye on logistics much more than the rest of the party. It was she who observed in the mall that all the food the mall group had stored up was going to go bad with no refrigeration.

She ALSO knew that trouble was brewing in Takashi's love triangle. I love in the story when she functions as his brain trust/adviser. Her and Kohta both. Them making observations about the state of the group and their situation was always kino.