|Name in Japanese||綴 梅子|
|Romaji Translation||Tsuzuri Umeko|
|Debut (Anime)||Episode 06|
|Debut (Light Novel)||Volume 02 (Chapter 2 / 2nd Ammo)|
|Appears in||Light Novel, Manga, Anime|
|Voice Actor (Japanese)||Masumi Asano|
|Voice Actor (English)||Erica Harte|
|Classification|| Butei (Dagula)|
Homeroom teacher of 2B
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.