Union Arena's Code Geass collaboration represents a significant moment in the trading card game's expansion into anime properties. The 2025 Store Tournament series captured the competitive spirit of the hobby during a period of sustained growth in anime TCGs, with each volume serving as both a competitive incentive and collectible milestone for dedicated players. C.C., one of Code Geass's most iconic characters, appears here as a tournament winner card—a special designation that resonates with players who earned it through skilled competition. Her enigmatic presence and central role in the series make her a natural draw for both anime fans and serious collectors building comprehensive set collections.