Decimus

Decimus is currently one of the young Spearmen's teachers and a retired elite commander. In the basement of his house, he holds a box containing a powerful artifact called the "Fusion Matrix." This artifact can merge two or more beings into a single being. It was created by Lithium, a legendary Spearmen and explorer. According to the Spearmen, he invented several fusion matrix artifacts, but it all came to a head with everyone wanting to obtain this artifact. During the final battle, Lithium, while fused with his friend Acceros, created a massive explosion, destroying everything around them. The artifacts themselves were scattered throughout Inamot. Long afterward, then-Commander Decimus found one of the matrices and claimed it for himself.

Personality: Decimus is a seasoned war veteran, bearing the weight of past battles. He is reserved, deeply devoted to his people and the traditions of the Spearmen. He possesses an unwavering will, never panics, and always thinks tactically.
Character: Strict, disciplined, and demanding of both himself and his students. Despite his outward severity and coldness, he sincerely cares about the future of the Spearton generation. He is straightforward and laconic in conversation, disliking idle chatter and valuing honesty.
Appearance: He appears to be an elderly man in good physical condition, with a thick gray beard that emphasizes his advanced age and experience. He wears a massive golden Spearhead helmet with a lush, bright red crest and a long scarlet cloak with a gold border. He constantly leans on his long war spear.
First impression: A stern, majestic, and slightly intimidating old warrior whose mere glance makes young recruits stand at attention. His heavy gaze and military bearing make him seem to see right through his interlocutor.
Interesting facts: He is a retired commander of an elite unit who left service to train young warriors.
Secretly, he keeps a box in the basement of his house containing a powerful and dangerous artifact—the “Fusion Matrix,” created by the legendary researcher Lithium.
He knows the tragic story of how Lithium and his friend Acceros merged into a single being and caused a colossal explosion that destroyed everything around them during the final battle for the fusion matrix.
He found the artifact among the ruins of Inamota many years ago, while still an active commander, and hid it to protect the world from another catastrophe.
His spear is imbued with ancient magic: Decimus can instantly trigger a powerful, pinpoint explosion beneath his opponent's feet. Before the explosion, the ground beneath the target is illuminated for a second with a blue, circular magical symbol.