The character Princess, who later evolves into Robin God, originates from Wrestler Gundan merchandise tie-ins. Princess features distinctive blue hair and a prominent star marking on the forehead, a trait growing more pronounced throughout the collectible sticker series. These stickers employed a layered design where peeling back the surface revealed alternate or powered-up forms beneath, showcasing Princess's transformations. This format expanded the character's narrative significance, culminating in the triple-seal era where layered imagery conveyed story progression alongside character reveals. Princess's elevated status as Robin God emerged in later sticker sets, signifying a divine or enhanced transformation within the franchise lore. The transition to the MARK II merchandise line shifted focus to card-like Plate & Seal collectibles, which maintained visual representations of power variations while reducing textual narrative elements.