Yes once the game has most of the characters planned or at least how many Kin we plan for you to look after before you can enjoy post game content she'll explain how many you need to rank up.
Thanks for the Data! We actually didn't have that yet you should join the Discord just so you can give us any more Information like that you find In future builds!
For some reason there's a bug the RL Isn't ranking up currently and playing the rank up event. It's not the worst since like you said we don't have more Kin available just yet.
Oh hahaha yeah we had a lot of Input on how Male Flare should act from the writers girlfriend (I hope he took notes!) and Female Flare was more so from our male view on the team haha.
Expect a lot more to come In the future In terms of 'strange' stuff to be used for fun time. A lot of different monster boys and girls to go through!
Thank you so much for playing the game!