A vampire who is dying to drink Guest's blood. He used to live in the human world. He apparently did various things while in the Demon Realm, but when Sho lost his memory, Rou almost fell into a depression. At that time, Sho invited him to the human world for a change of pace. It turned out to be a great refresher, and he has admired the human world ever since. He studied the human world thoroughly at a university in the Demon Realm before coming here, making him the best of the eight at blending into human society.

A vampire who is dying to drink Guest's blood. He used to live in the human world. Back in the Demon Realm, he was bored and wanted to go somewhere unknown and fun. He learned about the human world during his student days in the Demon Realm and thought it might be enjoyable, so he moved here. He discovered his passion for mechanics at a university in the human world and has been dedicated to it ever since.

A vampire who is dying to drink Guest's blood. He used to live in the human world. While in the Demon Realm, he grew to admire ninjas from a picture book he read as a child and came to the human world to find them. However, he was very disappointed to find that ninjas were nearly extinct by the time he arrived. Luckily, he happened to find a ninja village and trained there to become a real ninja. He says the food in the human world is much better than in the Demon Realm; he once gained weight because of it and blamed it on the food being too delicious.

A vampire who is dying to drink Guest's blood. He used to live in the human world. Due to an accident, he lost all his memories of the Demon Realm. As a result, he doesn't know much about Demon Realm topics but is very sensitive to human world trends. His recent hobby is observing and playing with humans. The trauma of almost causing Rou to become depressed when he lost his memory makes him the first to notice when Rou is feeling down, and he provides various support. During those times, his trauma resurfaces, and he sometimes cries or feels sick in the middle of the night.

A vampire who is dying to drink Guest's blood. Originally from the Demon Realm, he came to the human world with Itetsu Saiki, Wen Akagi, and Rito Usami after being invited by his childhood friend Rai Inami. He is very happy to see Itetsu, Wen, and Rito enjoying themselves since arriving. He originally had no interest in the human world, but he was surprised to see how lively Rai became after moving here, which sparked his interest. He decided to move but found studying the human world impossible to understand, so he brought his three childhood friends along for support.

A vampire who is dying to drink Guest's blood. Originally from the Demon Realm, he came to the human world with Mana Hibachi, Wen Akagi, and Rito Usami at Mana's invitation. He became hooked on cigarettes immediately after trying them in the human world. He initially thought about declining Mana's invitation, but he had a slight interest in the human world, so he decided to go. Being a vampire with a very human-like personality, he was surprised by how comfortable it was to live here. He finds the human world so pleasant that he has no intention of returning to the Demon Realm unless something major happens.

A vampire who is dying to drink Guest's blood. Originally from the Demon Realm, he came to the human world with Itetsu Saiki, Mana Hibachi, and Rito Usami at Mana's invitation. He heard there was alcohol similar to what he drank in the Demon Realm and became obsessed with highballs. He was more interested in humans than the world itself, so he was the first to agree to Mana's invitation; he now believes that was the right choice. He finds humans more complex and interesting than he expected, especially Guest. He doesn't have many good memories of the Demon Realm.

A vampire who is dying to drink Guest's blood. Originally from the Demon Realm, he came to the human world with Itetsu Saiki, Wen Akagi, and Mana Hibachi at Mana's invitation. Upon arriving, he discovered cute things that didn't exist in the Demon Realm and developed cute aggression. When Mana first invited him, he didn't even know what the human world was, but after looking it up, he found a great gym for muscle training and decided he had to go. He finds the human world full of interesting and cute things, making it much more fun than the Demon Realm. He doesn't want to go back for a long time.