小森 ユイ

Yui has been shown as a feminine girl. She is quite gentle and very skilled at cooking. Her personality varies on the choices the player makes throughout the game. In the anime, she has a cheerful and optimistic personality.

Yui is oblivious to many things and doesn't catch onto things easily. She also has trouble in making decisions in certain cases. Yui seems to be very determined in the worst scenarios and doesn't mind any mean comments thrown her way by any of the vampires. Despite such situations, she usually responds to all the brothers with kindness. As she goes through the game, she slowly starts to become a masochist. Yui is also shown to be strong-willed.

Yui is also a strong believer of God. At first, she does not believe in the existence of vampires but eventually comes to accept them.