Aoyagi, Seimei
Summary
Seimei Aoyagi is the elder sibling of Ritsuka. He was seventeen years old when he was discovered murdered under mysterious circumstances, with his identity confirmed solely through dental records. Following Ritsuka's loss of memory, Seimei became a pivotal figure in his life, shielding him from their abusive mother, Misaki, and serving as a primary source of comfort and trust. Consequently, Ritsuka was devastated by the news of his brother's passing. He harbors deep bitterness and a vengeful attitude toward anyone potentially responsible for the killing.
