What's a good free Android game for collecting anime-style heroes and battling in co-op RPG adventures?

Blade & Soul Heroes is a fun, free-to-play anime-style action MMORPG where you collect a wide variety of heroes and engage in co-op battles. The game features colorful graphics and easy-to-learn gameplay, making it accessible to new players. While the gacha system can make progress a bit grindy at times, the game remains enjoyable as a free-to-play experience. You can collect different characters, each with unique abilities, and form teams to tackle various challenges. The co-op mode allows you to team up with friends or other players to take on challenging dungeons and bosses together. The game's anime-style art and character designs are appealing to fans of the genre, and the action-packed combat keeps things engaging. Despite the repetitive nature of some gameplay elements, the variety of characters and co-op options make it a worthwhile experience for fans of collectible RPGs.