In the preview build that I played, I was allowed unlimited gacha rolls in order to add a single character to my roster.
Full disclosure: I love video games, but I have all the digital skills of a wet bag of ramen noodles, so when I was asked to review Attack on Titan TACTICS, I panicked a little.
Lucky for me, Attack on Titan TACTICS is designed for both the hardcore (not me) and the casual gamer (definitely me) alike.