Due to her appearance, gentle personality and obsession towards Togawa Sakiko, she was often portrayed as a golden retriever dog in various kemonomimi and animalization fanarts (example:post #7401184). This was somewhat "confirmed" in the Arknights collaboration where she appeared as an obtainable character with golden retriever's ears and tails(see below, Caged Singer).
Episode 11 of Ave Mujica reveals that she has been impersonating her half-sister, that her actual name is Misumi Hatsune, and that her father is Togawa Sadaharu. This technically makes any yuri between her and Togawa Sakikoincest, but for practical reasons (see topic #31057) this should only be tagged when the art in question references this secret relationship. When their aunt-niece relationship or Hatsune's real identity is specifically referenced, it should be tagged as spoilers.
