Generally, Kotonoha is a gentle and polite young lady with a reserved character. Having almost no social life, she becomes incredibly dependent and devoted to Makoto. But this kind of firmness can lead to her to drastic repercussions. If she feels Makoto is leaving her and cannot be won back, such tremendous sorrow and desperation will drive her berserk or yandere which renders her to commit suicide, or to murder those she believes is stealing Makoto away from her. Her attachment to Makoto is so great that she refuses to accept that he would ever break up with her.