Sakuya Tachibana is the twenty one year old sub-leader of the first unit Retaliation Team and Lindow’s lover. She joined the Fenrir Far East Branch in 2065 and served as the Far East Branch’s operator because there was no compatible God Arc for her until 2067. Sakuya is recognized for combat and leadership skills that equal that of Lindows. She excels as a sniper and medic which has seen her called upon for various battles against unidentified Aragami. Sakuya is Fenrir Far East Branch’s top-ranked shooter and acts as support in combat while keeping the peace between everyone. She is dependable but tends to be worrisome, emotional, and overreacts but this doesn't affect her combat abilities.
She broke into Aegis with Alisa after Lindow’s presumed death and discovered Schicksal’s top secret Ark Project. Sakuya helped thwart Schicksal’s scheme and married Lindow in 2071.