Professor Amamori leads astronomical research as the Tsukuba Observatory’s chief scientist, credited with discovering La-Metal—a tenth planet hurtling toward Earth. His trajectory calculations confirming the collision trigger severe stress, manifesting in physical decline marked by progressive hair loss, a trait inconsistently depicted across adaptations. After an antimatter research explosion kills his brother and sister-in-law—initially deemed accidental but later linked to covert La-Metal operations—he becomes guardian to their son, Hajime. Nurturing the boy’s passion for astronomy, he mentors Hajime academically while integrating him into high-stakes research to combat the planetary threat. Teaming with Yayoi Yukino, his assistant and a strategic operative in La-Metal affairs, he validates the planet’s destructive potential and devises countermeasures. His analysis of gravitational anomalies triggering crustal instability spurs investigations into La-Metal’s influence. During the final confrontation, he orchestrates resistance efforts, retrofitting decommissioned military hardware from a museum to challenge the alien forces. Post-conflict, his attention shifts to an approaching star cluster threatening galactic equilibrium, sparking debates among survivors about cosmic interdependence. His dynamic with Hajime matures into a collaborative alliance fueled by shared loss and resolve to protect humanity. Balancing empirical precision with guardianship, he navigates ethical dilemmas of interspecies warfare and survival, prioritizing life preservation above all. His legacy intertwines unyielding scientific inquiry with the burdens of familial duty, cementing his role as both architect and guardian of humanity’s tenuous future.