Mahou Sensei Negima Karakuri Chachamaru Combat ver. is presented as a highly dynamic action figure capturing her signature mechanized elegance. The model stands in a poised battle stance, with a sinewy silhouette and a mix of polished white armor plates and dark, shadowed underlayers. Exposed gears and pistons along the limbs convey the Karakuri aesthetic, while subtle decals and painted runes accentuate her ancient-tech vibe. The weaponry aligns with the combat theme: a blade or gear-bladed staff integrated into her forearm, removable accessories, and a cape or cloak that flows with the pose. The figure features detailed sculpting on the head, with expressive eyes behind a visor, and hair rendered with individual strands to suggest motion. Articulation points at shoulders, elbows, knees, and ankles allow dramatic action poses, and the base/stand offers stability for display. Overall, the piece highlights precision engineering and anime character charm.

Within Mahou Sensei Negima, Karakuri Chachamaru is introduced as a remarkable automaton built using the Karakuri technology lineage. She serves as a loyal protector to her friends and teacher, occasionally questioning her own restricted programming as she encounters human emotions and conflicting loyalties. Her Combat version emphasizes her martial capabilities, showcasing how she adapts to dangerous missions while maintaining a calm, courteous demeanor. Throughout the story, Chachamaru balances duty and curiosity, learning to trust Negi and the students, forming bonds that transcend her mechanical origins. She battles formidable foes using precise, gear-driven techniques, often saving her companions in critical moments, ultimately revealing a nuanced blend of machine precision and growing humanity.