Kurenai Kiriya

Kurenai is one of Sumi and Takaomi's daughters and she's the fifth of the Kiriya's vampire family sisters. She's the one who sent the letter to Daisuke Tokitsu telling him to came from Tokyo to their mansion after he left the place 10 years earlier. She and Daisuke shared some feelings when they were younger, he also asked her to make a contract with him in one occasion, she loves him since then.