(COMIC1☆15) [Haraise Kaiwai (Yucchris)] Amazoness no Oujo-sama ga Ama ni Class Change Shitara Tako no Shokushu de Ahegao Acme Shuutoku Shichau! (Seiken Densetsu 3)
So Riesz somehow ended up in Feudal-sih Japan era where she lives in fishermen village, then the legendary tentacle octopus comes up with two ninjas, she got raped, almost got killed but one ninja betrays his friend and she got lost into the sea.
Then, Sekiro out of nowhere fucks her into living so I guess she jumps from game to game.