User blog comment:FairyRaven/Fairy Tail Chapter 396: Air, Review and Commentary/@comment-24102956-20140812153024/@comment-5303512-20140813020855

Franmalth the Armored Shell, maybe because he can contain all the souls he collected.

Sayla Clear Moon Sky, I don't know.

Kyouka Slave Star Angel, maybe because of her Reinforcement Curse she enslaves others to Tartarus.