Naji is a young boy who resides in the West Gate ruins of Trade City E-05, where he lives with his grandfather. He has short brown hair and brown eyes, and his usual attire consists of plain clothes and a white bandana. On occasion, he wears a costume that mimics the appearance of the giant insects called Cagasters, a tactic he uses to frighten people away.

By nature, Naji is a kind and gentle child. Despite the harsh post-apocalyptic environment that surrounds him, he maintains a positive outlook on life. When the protagonist Ilie feels distraught and uncertain about her circumstances, Naji offers her encouragement and helps restore her courage. His compassion and resilience make him a supportive presence in the story.

Naji's primary relationships are with his grandfather, who is his guardian, and Ilie, whom he befriends and supports. His role in the narrative is that of a supporting character who provides emotional grounding and a reminder of the simple, human connections that persist even in a broken world. He does not possess any extraordinary combat abilities or special skills; his strength lies in his kindness and his ability to uplift those around him.