On loading the Valt, ready player me is obviously the default avatar choice. To me it makes sense to have the rfox avatars as default, so users are required to select their ready player one avatar as a choice.
If the user doesn't have a citixen, there could be a boxed out area stating 'you currently do not have an RFOX citixen. They are available to purchase <insert link>
I just know from experience, that I will opt for the default if I'm feeling lazy, or think people won't be in there. It starts to become the image that identifies me e.g trendy santa, and could devalue having the citixen.
Just a thought.