I'm mostly gonna decide to roleplay some type of character first, then I adjust Champ body to better support the idea.
I'm also no stranger to save editing for give myself a quicker start.
So I settled on a few Champions:
1.Extra thicc cowgirl warrior, of course two-handed, of corse futa. With fair skin, ember eyes and gorgeous scarlet mane, scarlet as the roaring flame of desire inside her.
She wants it all: to be as tall as possible, to have the biggest horns, to grow huge tits and ass, and of course, to have the biggest horsecock and balls that alchemy can help create!
She greatly enjoys fuck and being fucked by anyone and in any way possible, so she ends up with medium-high corruption, but as long as it's fun she doesn't care. She's determined to take from the Marches everything they have to offer.
2.A kitten boy wizard, with a pair of black pigtails on his head, big purple eyes and cocoa color skin.
Being a lean shorty... possessing a delicate figure with a slight girly touch, he's 5.3 feet tall and has a feline dick 5 inches long.
Making his way with extreme caution through the Marches, the little wizard hurls fire and lightning at all who wish to force themselves on him. Also stays away from corruption. And even with less aggressive doms he keeps himself on guard and tries to keep distance. At least until there's a chance to turn the tables on these pesky doms and tops, since that's his big quirk. But in general, he just loves sex and is willing to participate in any bedtime activities with people who are nice to him.
3.A pretty fit wild elf archer with pale skin, long alabaster hair with a pair of long rabbit ears of the same color on top , and sky blue eyes. A full female. Full pure. She's 6.2 feet tall, with perfect C cup breasts, a firm ass and nice rounded hips. She mostly act cold and prefer girls in bed. But she doesn't mind using her ghostlight cock on men or getting a good anal fuck every now and then. But her tight pussy is only for the true queen worthy of all praise - Etheryn. And she'll do anything to get that sweet dick.
I also have a concept for a new Champion for the next run.
A simple, unremarkable human girl. Medium height, thin, with a boyish figure, short brown hair and similarly brown eyes. A white mage who just wants to help her friends with her spells.
But in this kind soul grows an inexplicable urge that frightens her very much, a desire to consume tainted fluids, particularly incubus cum and succubus milk.
Time after time she is losing a fight against this pernicious urges and get changed, but does everything in her power to reduce her corruption and remain herself at least in the mind's eye. So now she looks like a complete demon with all that horns, wings, voluptuous red body and infernal cock, but remains a pretty pure and good friend to everyone.
Well she's also acquired a strong tendency to submit to domy people and a great admiration to big dicks in general. So she rolls down in the rabbit hole very quickly with Kas, Brint, Arona, Berwy, Evelyn, Evergreen, Kalysea, Orlaith etc. Even though she remembers she's on a mission to save the world.