Sakuya Fujitaka functions as support staff for the S.O.N.G. organization, typically stationed on the command bridge of its submarine operations center. His duties encompass operational coordination, information analysis, and mission communications. Standing 176 cm tall, he possesses green hair and green eyes, though some sources describe brown hair and eyes. His standard uniform is a blue suit, light blue tie, and pale yellow shirt.

He maintains a serious, calm, and professional demeanor in his duties. Working directly under Genjuro Kazanari alongside colleague Aoi Tomosato, he demonstrates reliability and diligence.

His documented involvement occurs primarily during Season 1. In Episode 2, he concurs with operational assessments regarding Hibiki Tachibana's situation and later remarks on her courage during combat. During Episode 3, he provides technical explanations about relic amplification requirements, voices concerns over diplomatic repercussions from activating Durandal, and shows subtle amusement at Hibiki's reactions to Ryoko Sakurai. In Episode 5, he discusses intelligence leaks with Hibiki, noting governmental skepticism toward S.O.N.G. and speculating about potential political exploitation of Symphogear technology; he later inquires about secure Durandal transport protocols. Episode 6 reveals his visible relief when Durandal's transfer faces delays. Episode 7 features his investigative role: locating and disseminating critical files on Chris Yukine's background, including her prior Symphogear candidacy and disappearance. During Episode 9, he assists Shinji Ogawa after physical altercations with Ryoko.

Verified information regarding his background, development, or participation beyond Season 1—including later seasons (G, GX, AXZ, XV), films, OVAs, spin-offs, or mobile games—does not exist. His operational presence remains confined to command center activities without expanded narrative arcs or personal history across official media.