Chaika - The Coffin Princess (棺姫のチャイカ)

5 years ago, the 200 year war between the alliance of six nations and the Gaz Empire comes to an end when Emperor Arthur Gaz, the Immortal Emperor of the Gaz Empire, is finally killed by eight warriors known as the Eight Heroes.

After the war, the Empire's lands were divided by the alliance who later formed the Council of Six Nations to bring peace and order to the land. In the present, Toru Acura is former Saboteur (乱破師（サバター） Sabatā?) who lives with his sister Akari. Toru is unable to settle in this peaceful era as his Saboteur skills are useless and sees no meaning in his life.

While out foraging at the forest, Toru encounters Chaika Trabant, a white haired Wizard (魔法師（ウィザード） Wizādo?) with a white headband and a coffin, saving her from a man eating unicorn. Seeing their skills as Saboteurs, Chaika hires Toru and Akari for an important task; to steal the remains of Arthur Gaz from the Eight Heroes.

Chaika reveals she is actually Princess Chaika Gaz, the Emperor's daughter, who managed to escape during the end of the war and wishes to find her father's remains, which were divided amongst the Eight Heroes as his body part emits strong magical energy, so he may be given a proper burial.

However, the trio will face difficulties with the Post-War Kleeman Agency's Gillette Corps, who are tasked in capturing Chaika as they fear her existence will gather Gaz loyalists and the rebirth of the Gaz Empire as well as the power in Arthur's remains might reignite a war. Not only that, they must also face other groups, lead by girls who also claim to be Chaika Gaz. Thus begins Toru, Chaika and Akari's journey throughout the continent.

Source: Wikipedia

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