Karen Akune (阿久根 カレン Akune Karen) is a vampire who belongs to the Sakamaki Family. This is unbeknownst to her, as she lost her memory during a fire in her past. Later in the series, she becomes lost whilst wondering through a forest, and gets a strange feeling she has been there before.
Karen is an extremely tall and dangerously underweight teenager with white hair and ruby red eyes.
Karen is a quiet yet happy individual who does her best to express happiness to the people around her. She also somewhat a crybaby. Despite her likable personality traits, she can be very arrogant with an aggressive aura.
Karen was reading a book in the library of her home when she smelled something burning thing: her house was on fire.
Shu, Reiji and Beatrix managed to escape but when Karen tried to go out the window, a few books fell on her head, causing her to lose her memory. After that, she can only remember the faces of her brothers and her own name.
When she arrived at the mansion, she recognized Reiji and Shu's faces. Reiji said she resembled his sister (who he thought was dead), Shu was startled, and was annoyed to remember it. But they hardly knew Karen was in front of them.
She thinks he is very intelligent, and even came to fall in love with him, until she realized that they were related.
She thinks he is very perverted, but adorable.
She thinks he is cute and crazy. She pours out her personal problems with him.
- "You're so cute when talks with Teddy." - to Kanato
- "W-what? You and Shu are my...brothers?" - to Reiji
- "Have I said that I think you're adorable? Fufu." - to Laito
- "Why don't you go read a book? You're always with that headphones." - to Shu
- She reads 10 books per day.
- She don't like when Ayato calls her "Curry".