Hello! For now we do not plan on adding the option of playing as a female, as other systems and content are of higher priority. Further down the line we may consider adding a female main character as an option if there are requests and time/funds allow it. It's not something trivial to implement as it would require another set of voice acting lines and considerable amount of animations. We'll keep it in mind for sure.
Thank you for your interest in our game! You can find our patreon at this link Renestra Patreon. Current activity is limited as we're preparing on launching the next update soon.