Complete the indicated task in Dungeon Trial mode to unlock the corresponding Folk.
Ellen (Collbrande): Get 150,000 Campaign Points.
Ellen (Duergar): Get 30,000 Campaign Points.
Ellen (Kaladbolg): Upload a 4,500 Point Dungeon.
Keats (Alphard): Upload a 4,500 Point Dungeon.
Keats (Collbrande): Get 150,000 Campaign Points.
Keats (Duergar): Get 30,000 Campaign Points.
Keats (Valiant): Get 100,000 Campaign Points.
Enemy Strategy
Always remember to check the Netherworld Picture Books for tips and tricks. If you study them carefully enough, they'll give you the exact strategy needed to not only defeat your run-a-the-mill Folk creature, but also the massive Folklore bosses at the end of each realm. This is helpful if you're having trouble defeating any enemies you encounter.
Extra Costume 1
Collect All Folks for Ellen and Keats.
Filling the Picture Book
In order to get the pages of the Picture Book, just make sure to check every room carefully (don't forget you have a map when you press the Select button), defeat all the Folk you come across and destroy any of the floating crystals that hide treasure.
Hell Realm Cloak
To unlock the Hell Realm Cloak, you must destroy five Memory Stones. Here are the locations of the five stones. Keep in mind that all enemies in a location should be destroyed; otherwise, the stone you seek may not appear.
1.) Hill of Brimstone 1 (I)
2.) Hill of Brimstone 1 (II)
3.) Condemnation Tower (Level 2, East)
4.) Condemnation Tower (Level 3, West)
5.) Hill of Brimstone 2
After all five stones are destroyed, a sixth stone will appear. Head to the Inquisition Bridge to find it. Destroy the sixth and final stone, and the Hell Realm Cloak will be yours.
Shefra Folk Spirit
Shefra is in Chapter 1 for Ellen. Before Shefra will spawn you will have to have captured every other folk in the level. Once this is complete go to the middle save point in the level. You will see a turn off to your left, take it.
Shefra will be in the back half of the room but you can't attack her yet. She summons 3 - 4 folks that are a random assortment of Ogama and Daru. Defeat these folklore to cause Shefra to resummon them, when she does this she will lower herself to the ground.
Lock on to her and use Cait Sidhe on her. This will take 3 - 4 hits, just keep spamming it. If you get the timing right you can turn her red before she starts flying overhead. You could attempt to capture her, and it is possible if you are lucky in the fact that the folks she just summoned stay on the other side of the rocks in the middle of the room.
I find it much easier to hurry and defeat the folks first. She will stay in that sleep state for around 5 minutes. So hurry and take out the Ogama and Daru, then go back to capture her. Her timing is difficult and will take a few tries for most to yank her id.
If you're having trouble with the Daru, they can be taken out in one hit with Cait Sidhe. I find the easiest way to defeat the Ogama is to hit them twice with Boobrie and then do a 4 hit combo with Pouke, to conserve time when Ogama turns red I just finish him off with Pouke instead of trying to absorb him.
Bonus Folks...