Ragna the Bloodedge

The protagonist of this game, a man trying to challenge the NOL on his own, with white hair and eyes of different colors, the imitation of the Azure Grimoire on his right arm enables him to use the power of the Black Beast. Known as the "Grim Reaper", Ragna is a wanted criminal with the largest bounty in history for attempting to destroy the Librarium, thus targeted by many people.

Jin Kisaragi

Major of the Librarium and commander of the 4th Thaumaturgist Squadron, he was known as the "Hero of Ikaruga" that ended the Second War of Ars Magus. He is a handsome man with excellent swordsmanship and a master of ice. His weapon is the Nox Nyctores named Yukianesa. Recently, Jin went to Kagutsuchi alone and is considered awol.

Makoto Nanaya

Lieutenant of the Librarium, outgoing and hyperactive, a good friend to Noel and Tsubaki. She is used to act on her instinct without thinking too much.

Bang Shishigami

The leader of a ninja clan, lost his home due to the civil war. He took his subordinates with him and fled to the lower level of Kagutsuchi where he called himself the "Just bounty hunter of love and peace who protects Kagutsuchi", and acted accordingly. When the news of "Grim Reaper" the big bad guy appearing near Kagutsuchi reached his ears, he decided to seek him out and take him down.

Iron Tager

A soldier of Sector Seven, also known as the "Red Devil". He was badly injured in the Second War of Ars Magus but was saved by the scientist Kokonoe. From then on he has been working under Kokonoe. During his transformation he gained the ability to manipulate magnetic. Despite his fierce appearance, he is actually a learned gentleman.

Noel Vermillion

The main heroine of this game, a Praetorian Guard of the Librarium, lieutenant of the 4th Thaumaturgist Squadron. She lost her memory during the Second War of Ars Magus and was adopted by lower noble family Vermillion, later she entered Military Academy and joined Jin's Squadron after graduation, her weapon is the Nox Nyctores named Bolverk.

Hazama

Captain of Intelligence Department, the main antagonist. His true identity is Yuki Terumi, one of the Six Heroes, whose nature is cruel and thuggish!

Platinum

A girl who has three souls - Luna, Sena and Trinity Glassfille. Platinum owns one of the most power weapons - Nox Nyctores Arma Reboare: Muchōrin, possessing exceptional skill and power on magical attacks.