Umeko Tsuzuri, the homeroom teacher of 2B as well as Dagula's head of department. She wears a long black coat, black gloves, and black boots.

Umeko always stares at students with unfocused eyes, making her look like she's on drugs. Also, she is always smoking. Tsuzuri, characteristic of one of the teachers of Butei High, does not care about her students' grades.

She has a near prodigious memory in some areas, able to remember all her students' statistics. However, she tends to forget simple words, and spends some time trying to remember them as she speaks.

She is one of the elite Butei in the art of interrogation as she's one of the best 5 in Japan. No matter how firm the offender, after Tsuzuri's interrogation, they won't stay normal, and it seems they start referring to her as Queen or Goddess.

Hidan no Aria Series
Tohyama Family
Holmes Family
Hotogi Shrine
Vlad Family
GIII League
Regiment Hex
Other Characters
Hidan no Aria AA
Yagate Maken no Alicebell