@xsssssssss and @AvatarStormBringer to clarify the relationship wheel a little. The inner wheel is indeed the main love interests in the planned story line for Callisto. This does not however prevent romantic relations with those on the outer wheel or other additional characters that crop up in the content. The mechanics for the wheel is that it reaches a balance between the various characters. The inner wheel is calculated separately such that under normal circumstances you will only be able to access all lewd content with one central character at any time. You will find that later in the game that you will be able to likely romance two of these central characters at the same time due to a tweak to the calculation.
The outer wheel is calculated a little differently, with half the index related to the central character they are associated with and the other half a balance with the outer characters. To explain this in reference to the below, Julia's rating is lower than Tanya's at the time this check was made. This is not because I have been playing less attention to Julia, but because she is predominately allied to Tiffany, to which I have been paying no attention to at all. What this means is that while romantic content is still available with Julia, the full range of content that may potentially include threesome with Julia and Tiffany is not available.
At the start of the game the wheel with be set at certain starting values based upon the events during the prologue. After every single romantic interaction the wheel is recalculated based upon whom the interaction was undertaken and the nature of that interaction. A have designed a single label that undertakes this calculation that from my preliminary testing appears to be pretty stable. It's also very easy to implement in the code, as all of need to do is call this label from the code that includes the romantic interaction.
The positioning of the different sectors is quite deliberate and the outer characters are aligned to the inner ones as shown above. Additionally outer characters that are adjacent also share common interests. Interaction between Rachel and Alice being the most obvious one. Nothing is set in stone prior to the games completion, hence open to any contributions.
I will likely remove the listing of the actual indexes and replace with an information card about the crew member when it is selected on the wheel. Basic bio information plus a listing of all of the styles of lewd content and what is currently available / unlocked / remaining to be unlocked. Note that some of the content to be unlocked will depend upon progress of the main story.
