>>541760516
I know there is going to be people saying ''She is just butch'', I reject this statement and offer some evidence on why Otsuu is in fact trans.

Most obvious we have the fact she gets called ''Prince'' and feels comfortable being portrayed in a masculine manner, she also binds cause she is shy about her large chest. I personally think this is due to her original nightmare form being male, in fact when she goes into her ''halfway'' nightmare form, her voice deepens and her large chest is reduced, her full nightmare form resides in the Underground Cavern and is believed to be based on the pied piper (a MALE character), which can be seen when the nightmare is damaged which will show human figures playing a flute (like the pied piper).

In the locked up in love visual novel Jack fails to realize Otsuu is a woman and calls her ''brother'', which Otsuu is not too bothered by too.

If you still reject this headcanon (cause it wouldn't be canon unless directly proven by the developers) I ask you this; Does it not make sense that a male nightmare would wish to be a Blood Maiden (a thing only girls can be) so he can be with her love interest (Little Mermaid)? I fully believe Otsuu in her nightmare form was considered male and chose to be reborn a woman as a Blood Maiden to become closer with Little Mermaid.