Peri is a daughter of a noble family in Nohr and a subordinate to Prince Xander. Her supports with Laslow reveal that prior to the events of Fates, her mother (who she was very close to) was killed by a servant who became obsessed with her mother and wanted her forever. A very young Peri walked on the murder scene, thinking it was a lot of tomato juice that spilled before realizing that she was killed. She suffered severe emotional trauma as a result.

Voice Ref: https://www.youtube.com/watch?v=7SBlsUqCx-I&index=18