- Available: Have a save file where both P3 and P4 sides have been cleared
- Rewards: Adamas Bookmark, 25000 EXP
This is the final request in the game and it will have you facing off against Elizabeth, Margaret and Theo all at once. First and foremost, if you have the Omnipotent Orb equipped on any party members, take it off before starting the battle, as this will cause the trio to spam Megidolaon and cause 9999 damage to the entire party. None of the trio have any resistances for damage, and none null any ailments or binds, so you're free to use whatever you want in regards to that. In fact, having a few party members who can inflict something like Panic or Magic Bind to the entire trio at once is recommended. Combine them with Stagnant Air to extend the duration and you have a winning formula.
Now, to get onto the actual fight, each of the three tend to learn towards a specialization of sorts. Elizabeth does single target elemental damage, as well as binds (she can use all three) and making it so you take more damage (Matarukaja and Marakunda). Theo mixes in physical skills with a support role, as he can remove binds and ailments from his sisters with Mutudi and Patra (only one at a time). He also has Matarunda and Marakukaja, making it so you deal less damage. Margaret can perform two actions per turn, usually using a Ma-dyne skill on the first and a regular attack on the second during the beginning of the battle. She also has other skills, like Crazed Slash and Megidolaon that she will use as the battle goes on.
In terms of the most dangerous, Margaret is probably it, although Theo can be annoying with Mutudi and Patra. However, if you keep inflicting ailments and binds, then you are going to keep Theo busy with removing them. It's imperative that you cover any elemental weaknesses, especially with Margaret using Ma-dyne spells. The battle essentially comes down to managing buffs and debuffs, while trying to inflict as much damage as possible to all three at the same time. That's why multi-hit skills like Myriad Arrows or Hassou Tobi are very good contenders to bring, although the latter is exclusive to Yoshitsune.
As already mentioned, having one or two people on ailment/bind duty is a good thing, while the other three members concentrate on dealing damage. Sometimes, if you don't impede any of their actions for a few turns, Margaret will initiate an All-Out Attack on your party, which deals big Almighty damage to your entire group. This can be devastating, especially if you are in the groove of things. Also, if you're unlucky, Crazed Slash might hit one of your members multiple times, likely killing them. That means it's important to keep your health up, so don't neglect to refresh Fuuka's navi healing skills.