Senri & Rima

Background
Shiki and Rima are both models. They work together on many occasions and they take on assignments from the Vampire Council to hunt down level E vampires. The two of them share similar personalities and are almost always seen together. It's not very clear how deep their relationship is, but we have seen Rima being worried for Shiki and wondering if he's okay.

Story Summary
When Shiki is possessed by his father, Kuran Rido, Rima immediately notices something wrong. After confirming that he really wasn't Shiki, Rima battles Rido, demanding he leave his son's body. After receiving an injury, she yells at Shiki, telling him he was an idiot for letting Rido control his body so easily, and that he should love himself more. Her words alone are almost enough for Shiki to awaken and break his father's control. When Shiki wakes up, no longer under Rido's possession, he embraces the still unconscious Rima, apologizing. During the attack on Cross Academy, he carries Rima away from the dorm before it collapsed. She wakes while he was carrying her, telling him she was hungry and asking him to 'give her some blood later'. This is normally a request only made by vampire lovers to sate each other's thirst. He agreed. For a while, Shiki and Rima were looking for Ichijou together, as he had disappeared. The two appear again at the vampire ball the Kurans are hosting. Rima was Shiki's date at the ball.

In the Anime
In the anime they were dancing with each other at the Day Class/Night Class Ball