Houseki no Kuni Diamond - Natsufuku ver. presents a crystallized interpretation of the character Diamond, redesigned for summer attire. The figure captures Diamond's pale, gem-like surface with translucent facets that refract light in pastel reflections. The sculpt emphasizes a serene, watchful expression, with sculpted angles across the jawline and forehead that mimic cut facets. The figure stands in a poised, slightly turned stance, one hand resting at the hip while the other extends gracefully as if catching a sunbeam. The Natsufuku variant adds light, flowing fabric elements around the torso and shoulders, suggesting a breezy summer outfit without compromising Diamond's stoic presence. The base is designed to resemble fractured crystal, matching the gemstone aesthetics of the series. The painting uses soft shading to enhance depth and the subtle gradient across the figure's limbs, nails, and clothing, highlighting craftsmanship and attention to detail.

Diamond is one of the immortal gemstone inhabitants of the World, created to illuminate truth and endure the assaults of the Lunarians. In the story, Diamond embodies calm endurance, a reflective mind, and a restrained curiosity about human emotions and the concept of growth. Through encounters with Phosphophyllite and the other lunary gems, Diamond wrestles with questions of purpose, loyalty, and the moral weight of violence in a world where threats repeatedly emerge from the shadows. As events unfold, Diamond demonstrates strategic patience, analytical thinking, and a quiet willingness to sacrifice when the group is facing crisis. The character's arc often centers on learning to balance detachment with empathy, accepting help from friends, and revealing a hidden warmth that underlies the cool exterior. The Natsufuku ver. figure celebrates this complexity by presenting Diamond in a poised, almost protective stance, echoing the character's quiet strength and enduring resolve amid looming threats and fading tides of battle.