Oil and Water is Manuela and Hanneman's Paralogue Chapter in Fire Emblem: Three Houses. This chapter takes place at Mountains in Empire territory, and is available on all routes during White Clouds after Chapter 7.
While Manuela complains to Byleth about the way that the rain makes her wound inflicted by the Death Knight ache, Hanneman approaches and bickers with her. He mentions that he's going to report rumored sightings of the Death Knight to Seteth, but Manuela, eager for revenge, is set on searching for him as soon as possible.
On arrival in the Sealed Forest, where the Death Knight was supposedly seen, Manuela and the others instead find they're up against a gang of bandits called the Death God Gang.
- 3 Brawlers
- 4 Mages
- 1 Sniper
- 3 Archers
- 2 Swordmaster
- 2 Pegasus Knights
- 3 Brigants
- 2 Armored Knights
- 1 Mercenary
- 1 Warrior (Boss)
- Experience Gem (dropped from the Archer close to Manuela)
- Rapier (dropper from the Sniper)
- Macuil Evil Repelling Co (only if Hanneman is recruited).
- Indech Swords Fighters (only if Manuela is recruited)
Subjective: The following part of this article is based upon the editor's personal experiences and opinions, and therefore may not be applicable for all readers.
Unless you have been using Manuela, it is best to not move her too far from her starting location. If she goes too far, the commander will order his units to go after her. Before that, only one unit will advance on her location. Especially in higher difficulties, it is best to equip her with a batallion that can execute an offensive tactic from afar twice, so that she can stop the Brigand coming for her enough time for you to rescue her. Do note that the Pegasus Knights will start moving toward Manuela at around turn 4, and they can kill her easily, so be sure to either Rescue Manuela, or deal with the pegasi quickly.
At least on Hard, putting Manuela in the forest to the north is a decent way to keep her safe for a while. Even though moveing there will also cause the Brawler to move, the terrain bonuses will allow her to semi-reliably dodge enemies attacks, as well as allowing her to survive being hit twice by a Pegasus Knight while at base stats.
A way to simplify the mission is to have Flayn in your group and make her use Rescue when she is in reach of Manuela, then making them both fall back and have the rest of your units press on quickly, since the thieves carrying the experience gem and the rapier will try to flee. It's best to focus on cleaning the right side of bandits, then the left one, since facing both will bring no benefits.