Aya is a good natured girl that truly loves her family. Despite of her father's morbid activities and affair she continually strives to think positively and try to live a normal life. Her father, however, won't allow Aya to go outside and mingle with the other kids in fear of physical danger, so her only companion in the house is her pet rabbit, Snowball. Even with the lack of a social life Aya maintains a cheerful attitude. It is noteworthy that despite witnessing things that are too horrific even for most adults or could drive one to insanity Aya is still able to keep a level head at a very tender age.
Her love for her parents is one of the driving forces in the game. It is shown in flashbacks that she is raised normally by her parents wholeheartedly, cementing her belief to love family to the end. Lack of outside life didn't hinder her maturity because of her parents' attention and constant care. This fact is what causes Aya to believe that her parents are genuinely good. Her devotion to both of her parents is what encouraged her to face tasks that are seemingly impossible for a girl her age to even consider undertaking.
She would try everything in her power to save a loved one; even potential enemies. When the curse started, tormented spirits began to reanimate to relive their desperate last moments. Whenever faced by these spirits, Aya would help them to gain freedom at the cost of her safety. One incident showed Aya's compassion was when their maid, Maria, was betrayed and injured by her deranged father. Despite being hunted by the very same person, she mended her wounds and tried to help her. She has an uncanny talent to mend wounds much like Maria.
In the true ending, though, Aya's real personality was shown. It was implied that Aya might have turned out to be what her father was when she grew up; a sociopathic murderer. The red book her father had been reading was shown in her possession, having picked it up after leaving their burning home. Operating a small clinic in the middle of a forest, she shows goodwill to 'patients' to lure them unexpectedly to be experimented upon.Tutorials: