Hah! Well, thank you so much for the compliment, Bravanger. And thank you for the support, Patrick. Alright. well, if folks are willing to share with me their thoughts in honest discussion, here are my currently percolating contemplations on how I would fulfill the two big character concepts currently brought up in this topic so far.
The Shemale Broodmare:
The big hassle I, personally, would face with doing such a character would be the simple fact that I hate non-consensual stuff. Maybe it's just that I've been soured on it by stuff like Majalis' work, but that level of high-tier dom+sadist material just turns me right the hell off. So, right there, that limits the character arcs I can actually do, and probably strips away the ones fans of the idea would want, like mind-break or sissyfication. If I did such a character, ultimately, they would want what you do to them, which would probably bore people here.
Species I just can't settle on. I know that they'd probably work best, in my mind, coming from a species with big "macho" associations, but I can't decide between anthro or demihuman. As I mentioned earlier, a stallion-morph, minotaur, stag-morph or lion-morph would work well. But so would something like a centaur, an orc or an ogre. Anything that you normally associate with being a big, strong, burly, huge-cocked man, for the greater contrast when he ends up a curvaceous dickgirl, with only her mighty cock beneath her wobbling belly left to show what she originally was.
Character arc... like I said, with my dislike of non-con, that really limits what I can do. The first idea in my head that seems to have real strength to it is the concept of a "trophy bride", where he becomes yours as a sexual plaything as a result of some quest. Interacting with him lets you find out his secret; he may be a big burly guy on the outside, but on the inside, she's really a girl. She's like Sissy in that she wants to keep her cock, but otherwise, she hates her body, and wants to be like any other woman from the tribe; a lush, fertile breeder ready to give her husband many children. She has some of Inari's nature, in that she's always wanted to be pregnant; she wants to feel what it's like to have a baby kicking in her belly, then nursing at her teat. She wants to nurture life inside of her. But she's different from him in that whilst Inari identifies as a man who gets pregnant, she's a woman who has been denied her femininity, including the organs to make pregnancy happen.
The PC, of course, gets to make that happen.
The Femme-Stud:
This idea has proven a true tangle of thoughts to me, nothing really solidifying even as I attempt to put type to screen. Which is more reason why this is just me discussing rather than actively planning, I suppose.

The rudimentary concepts I have are two-fold.
The first concept is that of a "trap-stud"'; a femmeboi character whose femininity is belied by the truly impressive maleness he sports between his legs. In contrast to the stereotypes of traps, he's aggressively flirtatious and very dominant in bed. He only goes after feminine characters, and while he doesn't outright hate highly masculine-appearing ones, he won't bed them. He explains it's because he's straight, so they don't appeal to him sexually. Whilst the straightness is arguable (he will fuck a girly-looking boy as readily as a busty woman), it is true that he's a "femmesexual". Moreover, he's got a sexual fear of highly masculine individuals; he refuses to succumb to the stereotype of femmebois bending over for anyone who waves a cock under their nose and shouts at them. His breeding fixation is a genuine focus, but moreover, it's a dominance thing. Deep down, though, he's a lonely soul who just wishes he could find someone to love him for who he is, not as a sexual toy. The PC can potentially win his heart if they approach him with the gentleness and respect he craves. At his highest love, he's even willing to share the breeding duties himself; maybe he doesn't physically go full shemale, but he does allow the PC to give him a womb of his own to fill, although he's adamant on paying the PC back for every filling they give him.
The second concept is a true "studette"; herm or dickgirl, she identifies as female, but at the same time, she's a true... whatever the term is for "cockfiend who likes using their cock instead of taking cock". She isn't necessarily focused on breeding, at least before the PC gets into her heart; in fact, I think she makes more sense initially being just about the rough fucking and the huge cumshots. It's only after you prove to her that there's more to sex than just a string of empty, soulless fucks that her seeder's instinct awakens; she can be tricked or sweet-talked into carrying as well, but her fetish is to fill the PC's womb and relish in seeing the proof their love come into being. It's like a good, hearty cumflation that lasts for months and ends with an adorable little sprog to love and cuddle. Of the two, I freely admit that this is the weakest concept; even I can see this basically amounts to "Miranda with an impregnation fetish".
And yes, before you ask, I have brought up with Alder that a post-romance Miranda developing an impregnation fetish could make a lot of sense, given her dominance streak, control freak slant, fixation on her cock, and decision to start a family with the PC despite those traits.
On a different topic, I don't have any ideas how Roa being a follower could be pulled off. But, if it happened, I'd love the option to give him Anusol+. I don't know how to explain why it is, but I can't help but feel that Roa would make an excellent boi-mom and take to popping out litters of bunbuns with aplomb. I also think it'd be really good character development for him to reveal there's more of his mom in him than was thought by turning out to be a benevolent, nurturing and affectionate patriarch (matriarch?) for his brood, regardless of little details like who gave birth.
I just have this inescapable mental image of Roa in my head. His belly is hugely swollen, equivalent to a human woman's full-term with triplets, visibly rippling and denting as his litter squirms to get comfortable, anxious to come out into the world. The bunbuns from his last litter are tucked up next to him, one in the crook of each arm as they greedily nurse from Daddy's swollen, just barely breasts, suckling on the surprisingly rich bounty of life-giving milk he has to feed his children. The litter before that are gathered respectfully around Roa's feet, smiling up at him with childish joy as he espouses valuable life lessons to make sure his bunnies grow up to be good little rabbits. His cock is out of its sheath, half-erect and lazily rubbing against his belly, and he wears a smile of contentment, looking truly blissful at having found his place in the world.
I don't know why, but this image is just... I think it's erotic, adorable and heartwarming, all at the same time.
Also, whilst actually mpregnating Cale is a contentious matter, as raised in his topic, anyone think he's a prime source for mpreg-related dreams in the game? Because I'd love to discuss ideas for mpreg-themed dreams, be it with him or otherwise.