List of quests (Cold Steel III)/Chapter 4/No Man Left Behind

"I received an emergency call from Lechter. He's being so secretive... What could it be? He asked me to go meet up with him in front of Heimdallr Central Station. I suppose the festival can wait for now."

No Man Left Behind (レクターからの依頼) is a required quest that occurs during of .

Background
The quest is available on June 17th on the day of the Summer Festival.

Walkthrough

 * 1) Head to Heimdallr central Station to start the quest.
 * 2) The available party members for this quest are: Rean Schwarzer, Sara Valestein, Claire Rieveldt, Agate Crosner, Tio Plato, Sharon Kreuger, Olivier Lenheim, Tita Russell, and Lechter Arundel. Ash Carbide joins the party after reaching a dead end.
 * 3) Explore the Heimdallr Underground and while exploring, the following bosses will appear: Regenenkopf Type-II, Supreme Giant Isopod, Dicephalosaurus, Great Abyss, and with Magic Knight Azura-Luciel being the final boss.
 * 4) The quest will be completed after defeating Magic Knight Azura-Luciel.

Notebook

 * We have to search for the agent still hiding in the tunnels below Heimdallr.
 * We still haven't spotted the agent yet. Let's head to the next point.
 * Seems like the agent ran into a dead end. We'll have to approach him carefully...
 * We finally captured the agent. The others were able to make arrangements to return him safely to Calvard.