He is the leader of the infamous Black Hawks, a Warsfeil and a military strategist. He has held the post of the Barsburg Army's Chief of Staff for several years after the Raggs War, and after he drowned Marshal Oak, rose to become Field Marshal. It appears that he is widely known and respected throughout the Barsburg Empire for his accomplishments, despite his relatively young age, usually being greeted with salutes by his inferiors when they see him, but because he is a Wasfeil, many soldiers talk about him negatively behind his back or are afraid of him.
He is directly or indirectly responsible for many of the turmoils that Teito has suffered in his life including the death of Mikage and Weldeschtein Krom Raggs, Teito's father. Ayanami seeks the Eye of Mikhail and has been shown to be targeting the Seven Ghosts, particularly Zehel as the scythe that Zehel is wielding actually belongs to Verloren, Ayanami's soul.
He is revealed to be the reincarnation of Verloren later in the story, and is trying to regain his original ageless and powerful body (Verloren's Body) by unlocking Pandora's Box.