This is the walkthrough for the 5th chapter of the side story DLC in Fire Emblem: Three Houses (FETH, FE3H). Read on to see what you can do in Abyss, as well as all battle info, map features, enemy data, and a strategy guide for the battle, Besieged in the Chapel Ruins.

Chapter 5 - Betrayal

Exploring Abyss

Chapter Objectives

Before the battle starts, you are free to wander around Abyss and talk to inhabitants and browse shops.

Take note that this will be the last time you can explore Abyss in the side story.

Chapter Tips

You can get a Rusted Bow in the Scrap Heap Room to turn it into an Iron Bow.

Chapter 5 Mission: Besieged in the Chapel Ruins

Battle Preparation

Study Aelfric's Abilities

Aelfric joins you in this battle. Although he is vulnerable, he has powerful magic spells, so you can use him from a safe distance.

Map and Overview

Aelfric joins your party

For this battle, Aelfric joins your team. However, make sure you protect him or you automatically lose.

Hapi's summoned monsters are not your allies

Although the monsters involved in the battle are summoned by Hapi, they are not your allies. They are considered a third army units, and not ally units, because everyone in the map is an enemy for them.

Enemies

Enlarge A

Enlarge B

Units A will keep spawning around the Thief Leader if you have not defeated him yet, and Units B will spawn on the right side later on as backup.

Hapi will summon these monsters when you defeat the Thief Leader.

Enemy Stats

Chests

There is only 1 chest in this map, which is found beside Metoday's initial position. You can use Yuri or Ashe to open the chest with their Locktouch ability.

Map Features

Terrain Types

Tips and Tricks

Split the group in two

Make sure to have 1 healer on each side, and do not isolate Aelfric in a dangerous position. Since enemy reinforcements will spawn at the top left and top right, split the 2 groups in left and right, before you head down to the larger number of enemies.

Secure the Ballista

Defeat the Ballista user at the start so he does not target the weaker units. Once you have gained control, use it to one-shot the Thief Leader. Because of its high range, you can leave an archer on that post and keep picking off enemies from afar.

Take cover in forests and thickets

Use the greenery to your advantage. Especially that you need to protect Aelfric, position your magic users inside forests and thickets and have them finish off rushing enemies.

Use the monsters as distraction

Use the two wolves that spawn at the bottom to distract the enemy units and take them from behind. This will make your job a whole lot easier since their HP's would have been halved by the time you get to them.

Chapter 5 - After the Battle

The chapter immediately ends after the battle, so you are free to proceed to the next one.

Hapi Now Recruitable

After this chapter, you can now recruit Hapi in Part I of the main story.

How to Recruit the Ashen Wolves

Fire Emblem: Three Houses - Related Links

DLC - Cindered Shadows Walkthrough
DLC - Cindered Shadows
Chapter 1: The Fourth House	Chapter 2: What Lies Beneath	Chapter 3: The Rite of Rising
Chapter 4: Danger in the Dark	Chapter 5: Betrayal	Chapter 6: Return to Me
Chapter 7: Wolf Pack