Frame Arms Kagutsuchi-Otsu Fencer is a striking Frame Arms Girl kit from Kotobukiya. This re-imagining of Wataru Inata's Frame Arms mecha design transforms the heavy Kagutsuchi silhouette into an original female character, based on an illustration by Doyou. The model features the thickest armor in the series, with bulky leg and torso guards, and dynamic Fencer equipment designed for close-quarters combat. It includes a 180mm blade weapon called Experimental Type 3 Battering Ram that can be stabilized with the sub arm, plus a large shield that attaches via standard 3mm connectors. Two chest options, three pre-painted faces, interchangeable bangs, and both heavy and standard headgear expand display possibilities.

Within the Frame Arms World, Kagutsuchi-Otsu Fencer operates as the sister unit to Kagutsuchi-Kou, a reimagined mecha turned into a female character through Doyou's illustration and the sculpting artistry of Takashi Tanibayashi, Tsukuru Shirahige, and KOTOBUKIYA. Her heavy armor marks her as a formidable frontline combatant, yet her design emphasizes balance and mobility. The sub arm can stabilize large weapons, while the two chest sizes let her adapt to different missions. The large shield provides versatile defense, and the high-speed leg roller and waist boosters enable dramatic poses. Despite the mass, her joints promise extensive poseability for storytelling and display.