Trinity Seven: The Seven Magicians 7

 is the seventh volume of the Trinity Seven manga series, written by Kenji Saitō and illustrated by Nao Akinari. The volume was published on December 9, 2013 in Japan by Fujimi Shobo and slated for release in the US on November 22, 2016 by Yen Press.

Yen Press
All of the Trinity Seven members have finally gathered as the fierce battle between Arata and the demon Hijiri finally reaches its finale! But there's no rest for the weary as a new development quickly springs up, and this time the stage is set in Sky Library!! Since ancient times, it has existed in the open skies, presiding over all the wisdom of the world. Arata and the gang head there to investigate, but...huh? Why is Akio suddenly so small?! Volume 7 of this romantic comedy and sometimes-serious wizard school story is full of mysteries like this!!

Chapters

 * 28. Criminal Girl & His World
 * 29. Date & Talisman
 * 30. Record Quest & Semiramis Garden
 * 31. Forbidden Element & Aeshma

Bonuses

 * Truth - Arata inquiries of Levi's neck underneath her scarf, which she willingly reveals. However, upon witnessing her neck, Arata becomes deeply disturbed much to Lilith's concern.
 * Strong Arms - Arata questions Lilith's ability to lift her gun, believing that she uses magic to lighten the weight. As such, he requests to hold the gun, but to his surprise, discovers that the gun is extremely heavy much to Lilith's pleasure.
 * Defeat - Upon meeting Master Liber, Sora worriedly notes that the Paladin's designs is quite similar to hers.

Characters

 * Arata Kasuga
 * Hijiri Kasuga
 * Lilith Asami
 * Yui Kurata
 * Levi Kazama
 * Akio Fudo
 * Mira Yamana
 * Lieselotte Sherlock
 * Selina Sherlock
 * Lugh
 * Master Biblia

Introduction

 * Master Liber
 * Abyss Trinity