Ulla Euleus Hecmatika

Ulla Euleus Hecmatika (ウッラ・エウレウス・ヘクマティカ) is a princess of Ortus, the city where a million dead live. She's a dignified princess with ebony hair and pure white skin, but she also wears a leather gag and blindfold. They say she wears it to protect her noble personage from the voices and eyes of the average people.

Background
Ulla was born 15 years ago along with her older twin sister Celica. Her mother's last wish at dying moment was for all human to die. Ulla innocently inherited that wish and gained the power of death. Ever since then Ulla was raised to become the princess of Ortus. And unknowingly to her, she became the idol of murder.

Relationship
Kiriko Zubreska - Ulla's caretaker and teacher. Since she was a child Kiriko has been with her. Ulla confess she likes Ortus because Kiriko lives in there. She seems to have strong feelings for Kiriko.

Ai Astin - Ulla and Ai became friends soon after they met. Ai said Ulla is the female friend she made. Ulla regrets that she won't ever be able to look at Ai or hug her.

Celica Hecmatika - Ulla's older twin sister.