Haru is generally very shy and reserved.  At school, she is seen as eccentric due to her tendency to keep to herself and avoid contact with others as much as possible.  She has serious trust issues, finding it hard to differentiate between who truly values ​​her as her friend and who simply wants to use her for the status of her family.

Her father handled her frequently, not letting her feel free, she is an anti-hero of the Phantom Thieves and her code name is "Noir".