Dan Moroboshi, an extraterrestrial from Nebula M78’s Land of Light, was dispatched to Earth to observe the Milky Way. After saving Jiro Satsuma, a human, he assumed Jiro’s identity and adopted the alias “Dan Moroboshi” to join the Ultra Guard, a defense team opposing alien threats. As the team’s sixth member, he concealed his true self as Ultraseven, an Ultra warrior whose covert actions positioned him as an unofficial seventh member. Initially, Dan exhibited a courteous and amiable demeanor, forging strong bonds with teammates through keen observation and steadfast dedication to Earth’s defense. His idealism sometimes clashed with practicality, such as trusting alien adversaries’ honor—a choice that occasionally led to tactical missteps. Prolonged exposure to moral ambiguities, including humanity’s role in conflicts or aliens fighting for survival, gradually eroded his trust, fostering skepticism toward both hostile invaders and humanity’s destructive tendencies. Severely injured and with fading powers, Dan disobeyed orders to return home, shattering a mental block to transform one last time and defeat the Ghose Aliens. His departure required sacrificing his human form, though he later reappeared to mentor Ultras like Ultraman Leo, adopting a stern demeanor and rigorous training methods that reflected his hardened perspective on duty. In alternate continuities like the *ULTRAMAN* manga and anime, Dan is a cynical SSSP agent shaped by trauma: his diplomat parents were killed by terrorists, and his brother Rei’s kidnapping drove him to ruthlessly eliminate alien threats. This version clashes with allies like Shinjiro over moral compromises, rejecting mercy as weakness. However, witnessing Shinjiro’s resolve and confronting adversaries tied to his past gradually soften his rigid views, fostering respect for teamwork and redemption. Across narratives, Dan intersects with broader Ultra lore, aiding allies like Ultraman Jack by gifting the Ultra Bracelet and battling entities like Alien Temperor alongside Ultra Brothers. In *Mega Monster Battle: Ultra Galaxy*, he confronts Ultraman Belial’s forces, showcasing strategic acumen and loyalty to the Land of Light. *Ultraman Saga* highlights his vigilance against multiversal threats. Marvel’s *The Rise of Ultraman* reimagines Dan as a former agent trapped in a limbo dimension, rescued decades after his disappearance. This iteration explores his potential fusion with an Ultra entity, aligning with his legacy as a bridge between humanity and cosmic protectors. Dan’s arc consistently balances his alien origins with earthly ties, navigating idealism, disillusionment, mentorship, and redemption. He embodies roles as warrior, strategist, and enduring symbol of resilience across timelines.