yoshii kiria

Race: Hybrid/Artificial life form/Chimera
Gender: Male
Age: 15
Affiliations: ANTI-THESIS (formerly); Fairy Tale (currently)
Occupation: Fairy Tale's 1st Subdivision Lieutenant
Manga Debut: Rosario+Vampire Chapter 25 (First Season)
One passage from the Yōkai Encyclopedia: Chimera

The Chimera, according to Greek mythology, was a monstrous fire-breathing female creature composed of parts from three animals; a lion for the head, a goat for the back, and a serpent for the tail.
Kiria Yoshii is the former second-in-command of ANTI-THESIS. Calm and collected, he appears interested only in seeing how events surrounding his superior, Kaneshiro Hokuto, will unfold, sharing his view on releasing violence against students. It is revealed that Kiria injected his blood into Hokuto, transforming him into the same class as Kiria, with the power of Alucard (as Tsukune too). Ironically, he also seems grateful to Tsukune Aono for changing Hokuto after his failed attempt to destroy the barrier separating the human and Yōkai worlds. He later leaves Yōkai Academy with Hokuto after the school festival begins. In R+V II, he works with Miyabi Fujisaki for Fairy Tale and serves as the 1st Subdivision lieutenant.
Kiria has been described as very handsome, even compared to a male model by Tsukune. His eyes are usually the only part of him that transforms, becoming cat slit eyes—one vertical and the other horizontal. On the back of book 9, season 1, he has silver/white hair with red and green eyes.
In Chapter 63, Hokuto reveals Kiria is an artificial life form based around Alucard's body—a synthetic beast known as Chimera. This explains why Kiria's arm can turn into a scythe or a blade in his monster form.
Year One Resume
Kiria was first seen taunting Mako about her failed attack on Tsukune and his friends, claiming he is there to help her, causing her to attack him in anger. He appears amused when Mako loses her temper and attacks patients and visitors in the hospital ward, putting them under her control.
After Mako's defeat, he approaches a lovesick Kurumu with a proposal: Get him a fight with Inner Moka, and he'll stop the attacks on the News Club Saizo started. However, Kiria could not get his wish as only Tsukune can remove the rosario from Moka, and he did not want him involved in his "fun." Annoyed, he lets two Cyclops attack Moka and Kurumu, which he found amusing as the Cyclops were defeated by Outer Moka and Kurumu.
Right after their undercover agent is arrested following a failed attempt on Tsukune's life, Kiria approaches Tsukune and is amazed by the Holy Lock, finding it something he wants for himself. This ends up scaring Tsukune away and earning Hokuto's anger as he was being watched on suspicion of being an Anti-schooler.
Right as Hokuto attacks the student council, Kiria kidnaps Moka and defeats Ruby as part of Hokuto's plan to destroy the Great Barrier. Despite his numerous attempts to get Outer Moka to fight him, Kiria ends up bored out of his mind and chokes her in anger for his boredom. However, Outer Moka destroys the rosario seal and releases Inner Moka, who easily snaps Kiria's right arm before kicking him into submission after finally getting to enjoy his long-awaited fun.
However, Kiria managed to recover and sneak into Hokuto's hospital room and inject him with more blood to help him heal while musing on how Tsukune managed to thaw out Hokuto's frozen heart. He is last seen walking away with Hokuto during the School Festival kick-off party.
Year Two Resume
Kiria is currently affiliated with the Fairy Tale organization and is seen airlifting Miyabi Fujisaki and Kahlua Shuzen to safety. He made a failed attempt to kill Tsukune and classmates by causing the plane they were on to crash by sending a Fairy Tale gremlin. After the incident at the Huang family's mansion, he and Hokuto appeared to help Tsukune and the others infiltrate the Floating Garden, leading them to Akashiya Moka.
When Tsukune and the group are blocked by Miyabi Fujisaki on their way to Moka, Kiria jumps from an upper floor, lands on the ground, and casts a youjutsu spell, transferring Tsukune and Ruby to another dimension. Kiria then tells Kurumu Kurono and Mizore Shirayuki about the presence of another (Kuyō) who infiltrated Yokai Academy, and it was to him that Kiria sent Tsukune and Ruby. Kiria attacks Kurumu but is saved by Mizore at the last instant. Becoming bored, he goes for Mizore, aiming to kill; Kiria's attack is blocked by none other than his Subdivision Leader Miyabi, who calmly reassures Mizore that she can trust him.