Union Arena's Attack on Titan set represents a significant moment in anime trading card games, capturing the enduring popularity of one of the medium's most influential series. Released in 2025, this set continued the franchise's presence in the TCG market during a period of sustained interest in anime-based collectibles, appealing to both longtime fans and newer players discovering the property through various media. Mikasa Ackermann stands as one of the series' most iconic characters, and her representation in this rare card showcases the compelling artwork that defines Union Arena's visual appeal. Collectors pursue cards featuring Mikasa for her central role in the narrative and the character's substantial fanbase, making her rare variants sought-after additions to Attack on Titan collection cores.