Here's why:
* Anime Exclusivity: The "Maiden in Love" archetype is specifically created for the anime and doesn't currently exist in the real card game.
* Card Game Design: The development of new card archetypes in "Cardfight!! Vanguard" is determined by Bushiroad, the game's creators, and they have their own design plans.
* Popularity: While the anime features a "Maiden in Love" archetype, its popularity within the actual player base would be a factor in whether Bushiroad decides to make it a real card archetype.
* Balance: If Bushiroad were to introduce this archetype, they would need to carefully balance the cards to ensure they don't disrupt the existing gameplay.
In short, while it's possible that "Maiden in Love" could become a real archetype, there's no guarantee. It depends on Bushiroad's plans and the overall reception to the concept.