Hollow is a recluse demon bird who travels the world of Eon in search of a certain person. She is usually spotted around human settlements. During a blood moon, she was granted to be a Ruiner from Wails, her god. Now she has the power to destroy Eon with her own two hands. She is usually referred to as sparrow-head both because of her being a demon bird and her black hair glistening like a sparrow. She battles with a two-handed blade that was gifted to her by Wails himself.

Eve is a tenacious human with a bubbly personality. Her mannerisms are crude and boyish however but she can easily make friends in a crowd of strangers. One thing others find eerie about her is her smile that never seems to go away despite the situation she's in. She also as a unique ability that only she can do and even she doesn't know how it's possible. Eve is pretty useless in a fight but she makes great for distractions if anything.

Lady Elie is the lone survivor of the Human Kingdom of Celo. She witnessed the murder of her older sister, Alfena before the Forbidden Bird devastated the Kingdom. Due to the events of the tragedy, she has become mute and lives about the citizens as a commoner. Little else is known about her whereabouts. 

Eon was once a thriving world full of fantastical wonders until Wails, the god of the demons evaded nearly 800 years ago.

Now the world of Eon is in turmoil. War between humans and demons by order of their respective gods have wasted the world for over 700 years. The world's mana is slowly fading and life is dying. With the depletion of mana, Eon is now stuck in constant twilight and soon the planet will die. The only way to stop this is to subjugate the opposing side and obtain the blessing by their god to purity the world at the cost of the deaths of the defeated.