Rinya Kuraishima

"My uncle, Taiki raised me and my brother all on his own."
 * relatives = * a father she isn't aware about
 * Kouru Kuraishima (Mother, Deceased)
 * Taiki Kuraishima (Uncle, Foster-Father, Vampire Hunter)
 * Ayato Kuraishima (Brother, Missing)
 * Senri Shiki (Half-brother)|japanese = Midori Nakajima|english = Julia Martinez|weapons = An unnamed anti-vampire retractable sword}}

Rinya Kuraishima is one of Aneko's friends and a member of the Disciplinary Committee at Cross Academy. She is stoic and blunt.

Rido Kuran/her father she isn't aware about
Rido is Rinya's father that she currently is unaware of the fact that he's her father. Due to the fact that she is unaware of him, she calls him "the mysterious man with ruby and sapphire eyes" as he appears in nightmares and when she and Aneko find Kouru's hunter weapon and "sees" a small amount of her mother's memories in her sleep when clutching the said weapon.

According to Kouru's memories, Rido tried to take Rinya as bait to his siblings but an unnamed pureblood and the last of that bloodline stops Rido and turns Rinya human.

Kouru Kuraishima
Kouru is Rinya's deceased mother. Kouru looks a lot like Rinya and shares a personality with her. Kouru was a vampire hunter that, during a mission with her brother, was attacked by Rido and turned into a vampire also was abducted by him. She at one point developed stolkholm's and had Ayato then 3 years later of having Ayato had Rinya. Kouru later on falls for the Pureblood that saves Rinya. After Rido takes her daughter, Kouru begins to go into Level E-state, however, the man that Kouru developed feelings for saves her daughter and her.

Kouru, some sanity still intact goes to her brother's home and leaves her son and daughter within his care. She then takes his weapon and kills herself saying that there is nothing left for her and she can no longer act human. She says that she hopes her daughter will avoid that fate and informs her brother of the events that unraveled within the 5 years she was missing. Kouru also says that she wishes she could've watched Rinya grow up then turns to dust.

Taiki Kuraishima
Taiki is Rinya's overprotective foster father and uncle. Taiki swears to protect Rinya as he wasn't able to protect his own sister from Rido. Taiki also raised Ayato despite Ayato being an aristocrat vampire. Taiki babies Rinya a lot and cares for her a lot.

Ayato Kuraishima
Ayato is Rinya's flirty older brother. They both are extremely close and he is told by Taiki to pretend to be her half-brother despite being full siblings. He cares for Rinya dearly and teases her a lot.