A mysterious and beautiful girl who closely resembles Yuuma and Serena. She and Yuuma have similar personalities, but they don't get along very well. She is strong-willed and always speaks her mind. Reina likes to dress in gothic lolita clothing. She comes from a wealthy background and is in love with her childhood friend Souichi. Her older sister, Shuna, is the reincarnation of Aglaia, so she grew up hearing stories of Pompeii.

Spoiler

Reina is revealed to be the reincarnation of Tina, one of Serena's friends, a former slave.