Reinhard van Astrea is a human male born into the prestigious Astrea family, inheriting distinctive red hair and blue eyes from his lineage. Standing 184 cm tall with a slender yet muscular build, he typically wears a modified Lugnican Royal Guard uniform featuring a white coat with lilac accents and the Astrea crest. His early life was marked by tragedy. At age two, his mother Louanna fell into incurable "Sleeping Beauty Sickness." At age five, he inherited the Divine Protection of the Sword Saint. This event caused his grandmother Theresia to lose the blessing during her battle against the White Whale, leading to her death. It estranged him from his grandfather Wilhelm, who blamed him for Theresia's demise, and his father Heinkel, whose resentment turned to alcoholism and abuse. The "Reinhard Law" enacted when he was eight restricted him from leaving the Dragon Kingdom of Lugunica, deeming him a strategic asset equivalent to a weapon of mass destruction. Reinhard is characterized as the "knight among knights," embodying chivalry, justice, and selflessness. He only draws his sword when necessary, offers adversaries chances to surrender, and rejects discriminatory attitudes. Despite his power, he is sensitive to perceptions of him as monstrous or dangerous. His relationships are complex: he serves as Felt's sworn knight, maintains cordial ties with Subaru Natsuki, and endures fractured familial bonds, particularly with Wilhelm, who severed personal connections after Reinhard showed no remorse killing Theresia's resurrected form. His capabilities center on Divine Protections—supernatural boons granted by the world's core, Od Lagna. He can acquire any existing or new blessing instantly to adapt to situations. These include combat enhancements like arrow avoidance, where projectiles miss him, initiative ensuring his initial attacks always connect, and stat boosts during specific weather or times. Utility skills encompass telepathy, poison immunity, water walking, and regeneration via minor spirits that heal injuries. Esoteric abilities include resurrection via the "Phoenix" blessing if his soul remains intact, mana absorption nullifying nearby magic, and life-force draining. A defective mana gate prevents spellcasting but allows immense mana absorption to amplify physical attributes. He masters all weapons and martial arts, with instinctive reactions and analytical prediction enabling him to counter unfamiliar threats. His signature weapon, the Dragon Sword Reid, levies spatial-cutting energy blasts capable of erasing targets like Puck but only unsheathes against "worthy" opponents. Key conflicts demonstrate his prowess. He defeated Sin Archbishops—bypassing Regulus Corneas' invulnerability and surviving Sirius Romanée-Conti's death-link curse—and stalemated Satella, the Witch of Envy who destroyed half the world. During the Sand Sea battle in Arc 9, he withstood a direct breath attack from the Divine Dragon Volcanica piloted by Aldebaran using Reid and relevant blessings, later engaging it in high-speed combat. Reinhard cannot die while Od Lagna exists, as the world resurrects him in response to pleas for aid. This immortality, combined with his adaptive blessings and combat skill, cements his status as the world's strongest entity.