Capella Titis, an enigmatic alien from the planet Altair, shares her origins with Birdy Cephon Altera but carves a distinct path. With auburn hair and piercing pink eyes, her youthful guise belies a guarded, solitary disposition. Initially observing Earth’s unfolding events with clinical detachment, she fixates on the superweapon Ryunka and Satyajit Shyamalan’s maneuvers, strategizing with icy precision.

A guardian akin to Birdy’s robotic aide Tuto operates as her shadow, executing covert reconnaissance to advance her agendas. Forced to remain on Earth after Tokyo’s chaos severs her path home, Capella’s caution fractures. Manipulated into serving as Irma’s housemaid—a role mirroring Birdy’s obligations—she becomes a pawn in Irma’s schemes, her refuge laced with exploitation.

Though her shared Altarian heritage suggests biological or cultural parallels to Birdy, Capella’s unexplained hostility toward Birdy’s civilian identity, Shion Arita, fuels her indirect alliances with adversarial factions. Her involvement in Ryunka’s activation intensifies pivotal conflicts, casting her as a morally ambiguous agent navigating survival and subterfuge within the series’ escalating tensions.