1.u need to complete mira quest and get the one and second scene and make her pregnant
2.u need to complete all vampire quest and get the scene and make her pregnant too after that the windspirit will be spawn in flora garden and u can talk to him(don't skip the mira all main quest)and then after u talk with windspirit there will extra scene that show ryen alone and mira will come and then the rage Quest will be added in ur quest list and just continue it and follow the walkthrough that develop give in download section