Alighieri

Alighieri was Grace's hometown. It was destroyed seven years before the start of the story (during the prologue) by yoma and an Awakened Being Grace describes as having a pointed, obsidian body with lightening which levitated over the ground. She was attacked by a yoma which had posed as someone near to her, traumatizing her and making her hate yoma and those that touched her. She was later saved by Blanc and nursed back to health.

Alighieri is likely an allusion to Dante Alighieri, the protagonist from Dante's inferno, in which, Dante must travel through the entirity hell to reach heaven.