Havoc, They Cry (The Mongrel’s Warpath Book 1) (English Edition)

Valkyrie is an angel with a demon inside her, a demon that caused her to slaughter one of her peers. Charged with murder, she is banished to the world below, faced with an ultimatum: only by braving Pandemonium's depths could she hope to retake her spot by her goddess's side. However, as she plunges deeper into the realm's darkest reaches, her survival becomes a more pressing concern than her own redemption. That demon, the very reason for which she'd been banished, seems to be her only hope of avoiding death at dark creatures' hands.