The Tale of the Outcasts Series by Makoto Hoshino

An Uncanny EncounterThis is the story of Wisteria, an orphaned girl lost in darkness, and Marbas, an immortal being who shares her loneliness. The unlikely companions met on a quiet, uneventful night, and they set off together in search of the light. What begins as a chance meeting on the edge of the late nineteenth-century British Empire soon became a full-fledged journey to find their place in the world.

Outcast on the RunMarbas, a powerful demon, and Wisteria, a young human girl, are on a journey to find their place in the world. They part with Wisteria's brother, the demon hunter, and encounter a young lady bound to another of Marbas' kind. This is the tale of the eternal nights in which such meetings and partings ease the loneliness of this uncanny pair.

The Blackbell Family Saga Begins!As the demon Marbas and his companion Wisteria continue on their journey, they meet Diana Blackbell, a highborn girl who has more in common with Wisteria than their youth. But what has Diana sacrificed in her pride?

When Light and Darkness ClashAfter so long on the run, Marbus and his allies finally face the Sword Cross Knights, and the power of the Thirteen Calamities of the Wasteland is revealed. As Marbus and his friends struggle to defend themselves, more miracles emerge from the conflict.