No “Shisato” as a first name in those families.
This behavior is a classic defense mechanism. Shizuka’s perfectionism is not born out of arrogance, but out of a desperate need for control. Having lost her mother and living under the crushing pressure of her father’s unrealistic expectations, Shizuka learned that the only way to survive was to bury her true self and become a "doll"—an object of perfection that could not be criticized. Her distinct speech pattern and demeanor act as armor, preventing anyone from getting close enough to see the cracks in her psyche.