Trinity Seven: The Seven Magicians 10

 is the tenth volume of the Trinity Seven manga series written by Kenji Saitō and illustrated by Nao Akinari. The volume was released on November 8, 2014 by Fujimi Shobo in Japan and scheduled for release on August 22, 2017 by Yen Press.

Synopsis
It's time for the main event of the school festival, the Magic Research Battle! All of Trinity Seven (plus Arata) are arming themselves for battle against tough opponents from the rival Royal Magic Academies, but first they'll have to face--each other!? It's a knock-down, drag-out fight to the finish with only one pair left standing!

Chapters

 * 40. Valkyrie & Duel Start
 * 41. Fervent Girls & Thaumaturgist
 * 42. Limit Release & Abyss Returner
 * 43. Forbidden Fruits & Top Quartet

Characters

 * Levi Kazama
 * Arata Kasuga
 * Mira Yamana
 * Anastasia-L
 * Master Biblia
 * Lieselotte Sherlock
 * Arin Kannazuki
 * Yui Kurata
 * Master Liber
 * Selina Sherlock
 * Lilith Asami
 * Akio Fudo
 * Hijiri Kasuga
 * Lugh
 * Ilia
 * Sora
 * Black Imperial Sword Judecca
 * Abyss Trinity

Introduction

 * Master Akarsha