I can't tell at this point if Sister Gigante is going to be a Dom foil and form a Dom trinity with Enorme and Baiser as different kinds of Doms who are more or less in charge of a group, or if she's something entirely different. I really can't read her vibe at all, she doesn't seem like a Dom as much as she just seems like someone who goes with the flow and it just so happens a bunch of people come to worship her both professionally and privately.
At that point, they could be representative of the different styles of domination. Enorme was big on orders being followed, so could be D/s representative. Baiser's been all about restraints and sensation, so can represent B&D. if Gigante is all about pain leading to mindbreak, she'll be the SM rep, and that'll cover the trifecta.