It doesn't seem like these overrides are properly applying to the "SpecialCharacters" like it did in previous versions.This is now controlled by the files in the "PopulationData" folder. A rough rundown of the new system was given inYou must be registered to see the links.
Basically, the files in the "PopulationData/Groups" folder define groups of people. For example a family with two children. It defines what source template is used to generate the person and then assigns relationships between persons of a group.
The source templates are defined in "PopulationData/Sources". All groups in the base game will only refer to "StudentAny" as source, so it's enough to alter that file to change the gender ratio of students.
The parents of the group use either "AdultMaleFuta" or "AdultFemaleFuta", so you can also change the weight in those files if you want to increase or decrease the percentage of parent futas.
There are also single adults who use "AdultAny". Same with single students (orphans) who use "StudentAny".
The sources may delegate to other sources, but eventually they will end up at a source that delegates to a template from "PopulationData/Parameters". This is where things like stat ranges, age ranges, name source files, etc. are defined for the respective templates.
Last but not least, the scenario config file under "Config/DefaultGameConfig.xml" specifies how likely each group from "PopulationData/Groups" is to be used during population generation, so different configs may create different sociodemographic structures.
For example, if I change the PopulationData\Parameters\StudentFemale.xml file to have a breast range of 1-4 it seems like all the generated people abide by this range, but none of the "SpecialCharacters" people do, such as Daisy Maddox who still shows a breast size of 6 or Ivana Yochild with 7.