The Kamen Rider Nega Den-O figure is presented as a dark, imposing interpretation of the Den-O design, faithfully reproduced in S.H.Figuarts quality. The armor reads as a shadow version with a glossy black core, accented by gunmetal and crimson highlights that catch the light from every angle. Sculpted lines emphasize the armored plating, the belt mechanism, and the distinctive Den-O motifs, while subtle weathering gives the impression of long battles fought across time streams. The figure is engineered for dynamic posing, with multiple points of articulation and interchangeable parts that allow dramatic action poses. Included display options emphasize the character's menacing presence, from clenched fists to ready-to-strike gestures, and the optional head or face plates convey menace and resolve.

In the movie Kamen Rider Den-O & Kiva The Movie: Climax Deka, Kamen Rider Nega Den-O appears as a dark mirror of the hero, born from a disruption in time caused by the villainous interference across two eras. This new incarnation wields Den-O's power in a corrupted form, using it to twist events, manipulate Imagin and human fates, and challenge both the Den-O team and Kiva's riders. As the plot unfolds, Nega Den-O's presence pushes the protagonists to confront the consequences of altering history, forcing them to work together to restore the proper sequence of events. The character's arc explores themes of identity, destiny, and the burden of power, showing how even a familiar hero can become dangerous when time itself becomes a weapon. The climactic battles test strategy, courage, and loyalty, delivering a dramatic clash between light and dark.