Any depictions of Hayakawa Tazuna secretly being an Umamusume, more specifically Tokino Minoru. Examples include unnatural strength and speed, or horse features such as a tail and ears.
A running gag among the Umamusume fanbase often involves Tazuna trying to silence anyone who became aware of her true identity, usually with violence. An associated quote relating to this gag is "You know too much."
