Dino, also known as Deeno, ascends as a Fallen Angel and sixth seat-holder of the Octagram. Once a chief advisor and swordsman among the Seven Angels of Origin, he served Veldanava, the Star King Dragon and world-creator, until the deity’s demise. After obliterating the nation behind Veldanava’s assassination, Dino descended into purposelessness, shedding his angelic status. He adopted the mantle of humanity’s watcher before ascending to the Demon Lords’ ranks. Youthful features frame his appearance: silver hair streaked with violet tumbles messily around a face marked by dull grey-blue eyes and shadowed by perpetual dark circles. Six pairs of half-black, half-white wings lie concealed beneath a green cloak, draped over a purple-pink shirt and white pauldrons. Twin legendary blades—Excalibur and Caliburn—hang at his waist, though he wields the brutish greatsword Crumbling Fang in battle. Dubbed the "Sleeping Ruler," his lethargy defines him, favoring results through minimal exertion. He evades accountability, exemplified by deflecting Guy Crimson’s interrogation onto Rimuru Tempest. Yet loyalty surfaces under duress—wavering to fight mind-controlled allies, betraying Feldway to defeat Vega. Prolonged exposure to Rimuru’s realm reshapes him into a diligent scholar, spurred by Tempest’s cuisine and intellectual challenges. His millennia-spanning history intertwines with pivotal figures. Discovering Milim, Veldanava’s orphaned daughter, after her father’s death, he swore to protect her. Infiltrating the Demon Lords under orders to monitor angelic threats, he aligned with Yuuki Kagurazaka. Ties to peers include lodging in Dagruel’s domain and a fraught bond with Ramiris, whom he once tried to seal under external coercion. His relationship with Rimuru evolves from wary cooperation to reluctant subordination, compelled by Guy’s decree and Rimuru’s shrewdness. In combat, he prioritizes raw power over finesse, swinging Crumbling Fang with unchecked force. Ultimate Skills like Fallen King Lucifel and Slothful King Belphegor grant energy conservation, temporary amplification, hypnosis, and devastating attacks. Ramiris’s techniques shifted his spirit alignment from Light to Dark, erasing conventional vulnerabilities. His arc traces a path from apathy to engagement. Once content with idleness, Tempest’s influence ignites a dormant sense of duty, channeled into studying Rimuru’s anomalies. Internal conflicts—such as his manipulated betrayal of Ramiris and later redemption—expose tensions between loyalty and coercion. Choosing allies over former masters reveals a moral complexity, balancing self-preservation with buried empathy.