Labyrinth of Refrain: Covenant of Dusk is an upcoming dungeon RPG by NIS America. Just today, the company released details on the three main characters of the game.
Here are some details about Dronya, the protagonist, courtesy of Gematsu:

A beautiful raven-haired witch, cloaked in black robes. Dronya serves the Haltz Kingdom as a royal court witch, and is called the Dusk Witch due to her brilliant red-and-blue eyes. She has come to Refrain for the sole purpose of exploring the labyrinth beneath the town, though her true motive for doing so remains a mystery.

For more information about the other characters, you can look at Gematsu?s full post here.
More information about the game can be found on their Steam page:
ABOUT THIS GAME Become the living book, Tractatus de Monstrum, and command a brigade of puppet soldiers as you navigate the twisting passageways of the Labyrinth of Refrain.
When at your base, prepare for your journey by upgrading your brigade! Create new puppet soldiers, assign them different squads and formations, synthesize better equipment, take requests from townsfolk, and get assistance from Dronya in the form of Witch Petitions.
Once you’ve entered the labyrinth, be sure to search every nook and cranny as you jump over barricades, solve puzzles, and smash your way through walls to delve further and further downward in search of treasure and rare artifacts. But be careful, the more riches you obtain, the more vicious the dungeon becomes. Can you survi...