Probably would have been a "Supercon" or whatever they were calling the larger deluxes. Going by modern toy sizes now, I kinda imagined her being a larger Deluxe, like Ironhide or Impactor, or an average sized Voyager like any of the Seekers.
I really don't know. It's been so long I can't remember their names off the top of my head and I haven't heard from the client in a while. *shrugs*
The anime SSSS.Gridman had a lot of characters who were obvious inspirations from Transformers. Rikka was based on Shattered Glass Megatron.