I'm interested in how much "self-insert" the player character is supposed to be.
If it's set in stone you're freshly graduated that would possibly make the player's age merely 18 if it's like high school or 24+ if it's like college/university.
Other than having graduated from the academy and being kinda tricked to going on the boat, there's nothing more on your backstory or family.
Maybe it's all just a throwaway back story, but I find it interesting to think about.
https://monstergirldreams.miraheze.org/wiki/Hero
That is what the official Wiki has to say about the playable character, what is not there is left to one's imagination.