I would say that there is an natural overlap in personality, simply because "Girl who explores her submissive side" is kind of the essence of the whole cast. Thats imho less of an shortcomming but the core fantasy.
Its probably fair to point out that there is seemingly no woman in the whole town that isnt at least subconsciously a sub (or the big bad evil) from an general writing perspective, but in the end of the day, CC is a fetish game about male domination in an somewhat realistic environment (as in, thats not a unhigend anime world).