Ok, since I answered an ask about it, it got me to redo the process on Red Armor Leda. I've got some better answers
Her drop - Sword of Blood (Does a lot of damage, dunno what else)
I was wrong about the softlock thing, aside from kneeling she still counterattacks with a physical atk that can kill.
Her moves:
Grapple - Leda grabs someone and lvl drains them by pinning them down on the floor and making them smell her socks
Progresses each grab to wrapping socks around their mouth, then eyes, and then shoving a boot on top of them.
Alt. Grapple - If a unit walks within Leda's range and stays, Leda will pin them to the ground and stand on them, putting her hand on their face, then her boots, and then sitting on their face. This also lvl drains.
Armpit Grapple - If two units are on Leda's sides, Leda will grapple both and make them worship her armpits, lvl draining both.
Throne - If there are three units surrounding her, Leda will sit on one while smothering the other two's faces with her hands, lvl draining all 3. There is an option whether to rest here or resist. Resting lets her regain some HP with dialogue about being afraid to anger her, while resisting prevents this and gets her to pee in the chair's mouth (This doesn't do anything tho)
Infantilization - If a second unit lingers in Leda's range, they smell her musk and are turned into a baby. Babies can activate a scene where she cuddles them.
Red Empress Leda also has a LOT of alternate kneel scenes, I think it's like 7. There's also something she can do with breastfeeding units but as of now I only know that from an img gallery and have no clue how to activate it myself.