Currently a student at Liberl's Jenis Royal Academy, Renne was formerly Enforcer No. XV of Ouroboros, the Angel of Slaughter.

After the incident with the cult in Crossbell was resolved, Estelle was finally able to get through to Renne and she agreed to join the Bright family. She also rekindled her friendship with Tita who she had met during her time in Liberl.

After enrolling at Jenis, she helped with the orbal network tests being run in Liberl, but when she learned Tita had gone missing in Erebonia, she decided to come with Estelle and Joshua to find her friend.