FNF but Tail.EXE CharacterTest is a free simulation game for Android developed by Evil Eyes. In this app, you play as Tail.exe instead of the usual protagonist Sonik.exe. The game features some special character tests for Sonik.exe, including whitty, Ruv, Selever, Garcello, and more, and you can sing by pressing up, down, right, and left.

It's important to note that the game contains some bloody violence, but the San value should not drop while playing. The mod also includes Majin, which adds to the overall scary atmosphere of the game.

Overall, FNF but Tail.EXE CharacterTest is a unique take on the popular game, with its own set of challenges and tests to complete. It's definitely worth checking out if you're a fan of simulation games and looking for something new to play on your Android device.