Rei

Information
Rei is one of the 3 monsters summoned by Keima to assist the inn.

Appearance
She has silver hair and crimson eyes like glittering rubies.

Personality
Rei has great pride as a dungeon monster, and as a Vampire. After her summoning, she wanted to crush every single "invader" of the dungeon, just to prove her loyalty to her Lord, Keima. However, at first, her job was being a simple receptionist. She was devastated. She just wanted to be useful to her Master.

She is quite intelligent as she could deduce who was knocking on her door in seconds.

Summoning
Neruneh, Rei, and Kinue were summoned with Dungeon Points after Keima realized that their inn was understaffed. He noticed it when he had to work after Niku collapsed and had to rest for a day.

They were summoned to the {Master Room}, however, they were asked to go to the {Boss Room} later on because Keima planned to hold a Naming Ceremony. They received their name during this occasion.

Volume 3
No damage from sunlight, no hunger for blood, no weakness to running water, no sensitivity to silver, etc. She could walk under the sun and never go on a blood-seeking rampage. She could swim in any river and eat with silver cutlery. She could even enter others’ homes without being invited. Transforming into bats, wielding inhuman strength, flying through the air, sucking blood, making apostles, controlling ghouls, turning into mist, and so on. She couldn’t do any of that. Tools didn’t change anything, either.

She was taught how to do a good massage. Her massages are "divine", as they never hurt.