Kyle is the central protagonist from a timeline where humanity faced near extinction during the Great Invasion by demonic forces. As a magical swordsman, he led the Suicidal Assault Team in a final mission against the Demon King. He emerged as the sole survivor after delivering the killing blow, though severely maimed and dying. In the Demon King's chamber, he touched the mysterious artifact called the Divine Dragon's Heart, which transported him years into the past, into his younger body before the demonic invasion began. In his original timeline, Kyle endured profound loss, including the destruction of his village and the deaths of comrades during the assault on the Demon King's castle, shaping his motivations around vengeance and survival. Following his time displacement, he retains all memories and experiences from that future, creating a dual-layered existence where past traumas directly inform present actions. His background includes training under Zentos Ordy, who served as both mentor and friend in swordsmanship during the original timeline. Kyle's core drive is to leverage his foreknowledge to prevent the catastrophic future he endured. This involves meticulous planning to alter key events, strengthen alliances prematurely, and neutralize threats before they escalate. His approach is highly strategic and pragmatic, focusing on gaining influence and status—particularly through calculated heroics—to position himself as a central figure capable of swaying larger societal and military responses to the looming invasion. This contrasts with his earlier reactive path, showcasing significant development toward proactive world-shaping. Physically, he possesses exceptional combat capabilities as a magic swordsman, blending sword techniques with spellcasting. His swordsmanship is a talent seen once every hundred years, enhanced by techniques developed in his original timeline, such as mentally replicating opponents for training. The time displacement caused an unexpected fusion of his future soul with his past body, resulting in unchangeably enhanced magical power beyond natural limits. This allows him to wield potent spells like Haste and destruction-based magic typically associated with demons. He further augments his abilities through rigorous self-imposed conditioning, including wearing multiple Gravity Rings—equipment normally used to subdue criminals—to build strength and stamina under duress. His personality integrates the grim determination forged through loss with a calculated calmness derived from future insights. He demonstrates high intelligence in deducing complex plots, such as identifying a king as the mastermind behind an assassination attempt or locating presumed-dead allies using future knowledge. While driven by profound loyalty toward those he aims to protect, his actions occasionally necessitate morally complex choices, such as confronting and killing Zentos in the new timeline when loyalty compels Zentos to oppose him. Key relationships reflect both anchors and fractures across timelines. Zentos represents a tragic bond where mentorship turns into lethal opposition due to clashing loyalties. Figures like Seran, Lise, and Urza form part of his inner circle in his reset life, with dynamics evolving under his guided efforts to forge stronger early alliances. His equipment includes protective Dragon Leather Armor and the Divine Dragon's Heart artifact enabling his time displacement. Throughout his journey, Kyle embodies the tension between predestination and free will. His knowledge of future tragedies grants him advantages but also reveals cascading consequences when alterations spawn unforeseen challenges, testing his adaptability beyond mere recollection of events.