from A Certain Scientific Railgun
Tessou Tsuzuri is a character introduced in the Toaru Kagaku no Railgun sidestory. She is a member of Academy City's security organization, Anti-Skill. She is a teacher of an unnamed school, and is also a volunteer of Anti-Skill, where in the anime adaptation she is often partnered with Yomikawa Aiho. She is also an avid player of the Gekisho series of fighting games, and specializes in the character Jamie, to the point that she is called Empress Jamie for her skills on using the character.

A Certain Scientific Railgun
The student-filled Academy City is at the forefront of scientific advancement and home to the esper development program. The seven "Level 5" espers are the most powerful in Academy City, and ranked third among them is middle schooler Mikoto Misaka, an electricity manipulator known as "The Railgun." When strange incidents begin occurring throughout the city, she finds each crime to be connected to the elusive "Level Upper," a legendary device that allegedly increases the esper level of its user. As the situation escalates, it becomes apparent that there is more to the Level Upper than meets the eye, and that Academy City may be a far more twisted place than the glamorous utopia it appears to be. Toaru Kagaku no Railgun focuses on Mikoto and her friends—and the dangerous situations they find themselves in—as they get caught up in the matter of the Level Upper. As Mikoto says, "There's never a dull moment in this city."