- Hiyori's relationship with his family is still a mystery. He often worries that he will cause trouble for his family if he fails and sees himself as the cheeky problem child.
- The Tomoe Foundation had previously fallen in status and are in the process of rebuilding but still hold a decent amount of wealth and power. They are rivals to Eichi's family, the Tenshouin Zaibatsu.
- Hiyori's family manages a national café chain.
- According to Hiyori, his family has their own personal chef.
|Character||Hiyori's Nickname||Nickname for them|
|Older Brother||· Aniue (兄上)|
- Hiyori has great respect for his older brother who is the heir to their family's foundation, the Tomoe Foundation.
- Hiyori mentions that his older brother would often scold him for his temperamental ways.
Bloody Mary (Pet Dog)
A dog that Hiyori and Jun picked up off the street. Their dorm at Reimei Academy does not allow animals, so they had to keep her hidden. After Hiyori moved into the ES Dorms, she started living in his ES dorm room.
She is a small brown dog with black fur on her back and upright ears. She has darker brown coloring on her paws. She wears a green collar with a silver buckle.
- Bloody Mary most closely resembles the terrier dog type, specifically the Yorkshire Terrier breed.
- She was found rummaging through the garbage looking for food and covered in blood, hence the name Bloody Mary.
- It's possible she was abandoned by her previous owner due to her weak body. Due to her upbringing she is very timid and can't be left alone with other dogs.