Shiki, Senri

Senri is one of the youngest Night Class members and also works as a model with Rima Tooya. He is also roommates with Takuma Ichijou. He is usually the one sent out to hunt down a level E vampire.

Senri's father is Rido Kuran, making him Kaname and Yuuki's cousin. His mother's uncle is also part of the vampire council. As part of a plan to resurrect himself and infiltrate Cross Academy, Rido possesses Senri's body. During Rido's fight against Rima, Shiki is able to awaken within himself and attempt to regain control of his body. After Rido's revival in his original body, Senri regains consciousness.

(Source: Vampire Knight Wiki)