Available: Jakob marries another female character or the female avatar.
Recruitable Character: Dwyer
This mission requires you to take out the boss, an invader onmyoji. Dwyer is located in the northern part of the room, surrounded by allied knights. You'll be forced to move around the house but you can unlock some doors if you have a ninja unit with you. The gate separating you from the boss can't be unlocked so you have to reach Dwyer first and have Jakob talk to him first to recruit him in your party. It's quite easy to reach him since he will approach you first if you ended the turn with wounded units within his range.
After getting Dwyer to your team, heal up and eliminate the boss. You may want to take out the other enemy units first to maximize the HP you'll get. At the end of the mission, you'll also get a Friendship Seal and Talisman.