Hata no Kokoro is a menreiki youkai. She relies on her 66 masks, Created By Toyosatomimi no Miko, to properly communicate her emotions To Others, as her actual face is emotionless and can be likened to a poker face.
Kokoro naturally has a quiet, child-like personality but also a love of the stage, These emotions can be said to be stored inside the masks, as when she lost the Mask of Hope, her behavior became erratic, But Reverted Back Shortly After A Replacement Of Said Mask Of Hope. Touhou 
