Ichii Mariru

The protagonist and her are like sparring partners—completely comfortable with each other. Her rebellious behavior knows no bounds, like setting a nose hook on her older brother.

Their interactions have become a local attraction. She's actually happy, but she can't be honest with het brother and awkwardly blushes instead.

Super clumsy. Her cooking skills are especially disastrous and always cause stomachaches (mainly for the protagonist).