Frame Arms Girl Shingen Kai presents a striking silhouette with newly colored expansion armor Type G. The kit features vermilion, black, and gold accents across armor plates, a helmet, and rear-mounted banners that can be posed in multiple configurations. It comes with five pre-printed face parts—standard, smiling, shouting, standard/masked, and shouting/masked—allowing expressive displays. The skin tone matches the standard used with Gourai and other Frame Arms Girl models, while the hair parts are in a refreshed color and can be shown with or without the air duct-style hair components. The kit includes detachable hands in PVC, multiple weapon options, and 3mm joint compatibility for customizing with M.S.G and Frame Arms sets.

Shingen Kai is the girl version of the legendary armored frame originally designed by Kunio Okawara and illustrated by Humikane Shimada. In Frame Arms Girl lore, Shingen is a skilled warrior who augments her suit with EXPANSION ARMOR Type G for enhanced defense and speed. The Kai variant represents a powered-up form released after Shingen's initial model, combining agile feminine aesthetics with the robust lines of a traditional frame. Her weapons, Raikuninaga and Hoshizukiyo Masamune, reflect a samurai-inspired pedigree, while banner wings and helmet accessories evoke banners of battle. The character's face plates allow expressive display, and its compatibility with various arms systems invites imaginative diorama scenes and customization.