Niccolo, a tall, slender Marleyan soldier with blond undercut hair and a pointed nose, begins his journey as a hostile captive after Marley’s failed invasion of Paradis. Clad in military uniforms or somber formal attire during cemetery visits, he evolves from a prisoner of the Eldian military into a chef for the Survey Corps, his culinary skills bridging divides with former enemies. Initially clinging to Marleyan prejudices that paint Eldians as devils, he resists cooperation until gradual exposure to the Corps—and Sasha Blouse’s infectious enthusiasm for his cooking—softens his rigid worldview. Their bond deepens into mutual respect, reshaping his purpose: food becomes a tool for connection, not conflict.

Sasha’s death in Liberio fractures Niccolo’s newfound peace. At her grave, harassed by Military Police, he is shielded by Jean and Connie, then journeys to her family, offering solace through shared meals—a pivotal step in his acceptance into Paradis. Yet grief erupts violently when he confronts Gabi, Sasha’s killer, nearly attacking her and Falco before Sasha’s father intervenes, rejecting vengeance. This moment forces Niccolo to confront his rage and seek redemption.

His loyalty is tested when he exposes the wine laced with Zeke Yeager’s spinal fluid, a covert Titanization plot. Initially hesitant to admit his protective instincts, he alerts the Survey Corps, aiding their countermeasures. During the Yeagerist uprising, he safeguards Sasha’s family, guides them through Shiganshina’s turmoil, and allies with Paradisian forces against Marleyan threats.

In the aftermath, he stays with the Blouse family, aiding rescue operations and contemplating shared humanity. Years later, his silent disdain at Yeagerist ceremonies underscores his rejection of endless hatred. Niccolo’s arc traces a soldier’s struggle to shed indoctrination, the transformative power of empathy, and the fragile pursuit of reconciliation amid enduring fractures.