Her attitude toward Nagisa is similar to how Nagisa would treat novice cosplayers. She nitpicks Nagisa's mistakes and makes them out to be a bigger deal than they actually are.
This attitude shifts when they find out they both have a lot in common. She becomes more timid and polite.
Hayama's hair is long, dark and silky. She has pouty lips and a cold gaze. Her eyelashes and brows are thick. Her features are bold and unique. Her buxom figure only heightens this eye-catching look.