The Prime Suspect of the Spirit Tortoise Incident

The Prime Suspect of the Spirit Tortoise Incident (霊亀事件の容疑者) is the fifty-eighth chapter of The Rising of the Shield Hero manga adaptation.

Synopsis
The heroes from Glass' world are back. Are they the ones behind the Spirit Tortoise's corruption? Naofumi and the allied forces must fight to the Spirit Tortoise's heart to stop the rampage and find out who is truly responsible.

Summary
L'Arc, Therese and Glass have been revealed to be inside the Spirit Tortoise. But before Naofumi can confront the vassal heroes of another world, they disappear without a trace in a swarm of Spirit Tortoise familiars.

Going back to the rendevous, the different teams discover that every path leads to a dead end. With Filo's help, Naofumi is able to find a secret passage but before they can enter they are attacked by mimics of the vassal heroes. Upon the defeat of the mimics, Naofumi and the exploration team enter the true passage to the Spirit Tortoise's heart.

On the path, they find a near-empty hourglass which represents the Spirit Tortoise's power to prevent the Waves of Calamity. At the end of the path, they find the Spirit Tortoise's heart. Naofumi and his party are able to kill the Spirit Tortoise's heart but it just regenerates back just like the head. Thanks to the attack, Ost is able to locate where the Spirit Tortoise's puppet master is.

Characters

 * Therese Alexanderite
 * L'Arc Berg Sickle
 * Glass
 * Naofumi Iwatani
 * Raphtalia
 * Ost Horai
 * Filo
 * Mirellia Q Melromarc
 * Queen's Shadow
 * Elrasla Ragnarok
 * Rishia Ivyred
 * Eclair Seaetto
 * Fitoria
 * Motoyasu Kitamura
 * Ren Amaki
 * Itsuki Kawasumi
 * Kyo Ethnina

Monsters

 * Mimic Type Familiar
 * Filolial
 * Spirit Tortoise

Weapons

 * Vassal Scythe
 * Vassal Fan
 * Legendary Shield
 * Soul Eater Shield
 * Legendary Spear
 * Legendary Sword
 * Legendary Bow
 * Vassal Book

Locations

 * Reiki
 * Cal Mira Archipelago (flashback)

Differences from Light Novel
Information to be added later on.

Trivia
Information to be added later.