Manga by author Shinohara Chie - Status ongoing

From Friendship Scans: Beginning of 16th century, Alexandra was captured by slave traders in Ukraine during one of their many raids. When the traders arrived in Greece to sell the female slaves, a young handsome man named Mateus bought her and promised to give her true freedom. He hired countless teachers, scholars, and palace ladies to train her into the one perfect woman of her time. Mateus's kindness has caused Alexandra to deeply fall in love with him, and she secretly wishes to be his concubine. But cruel fate! Mateus has already promised her to his best friend, who is Suleiman the Great, Emperor of the Ottoman Empire! Mateus promised Alexandra of true freedom, but where is freedom when she is in another man's harem and can only look at the one she loves from afar? Not willing to endure this agony, Alexandra promises herself that one day, she will free both of them from their bird cages. But Mateus is the Grand Vizier, a power only second to the Emperor himself. So Alexandra must become the most influential concubine in order to have any hopewhich also means bearing Suleiman's son. However, Suleiman already has a son by another concubine, and this woman is determined to keep her son as the only prince and only heir. Thus begins the story of a slave that becomes the story of one of the greatest empresses of all time, Alexandra, the woman who would one day be known as Roxolana, Empress of the Ottoman Empire.

From Aerandria Scans:Rinko is an ordinary girl who was born with a mysterious birthmark on her left arm. But when that mark starts to get darker, strange accidents begin to happen everywhere around her, involving even the people she cares about. What will the powerful magic awakening inside Rinko bring her?In 1987, Purple Eyes in the Dark was awarded the Shogakukan Manga Award for the shoujo manga category.

Soko starts feeling sick soon after moving to a new city, apparently for no reason. As beautiful as she is, a lot of guys start to bother her, especially Kashi. While trying to rape her, Kashi disappears and after a few days another guy shows up pretending to be Kashi. And everyone but Soko believes him!He tells her he is Akira the Byakko, from the family of the West. Because she is the reincarnation of Souryo, the queen of the Oni from the family of the East, a monster that eats humans to stay alive, he must destroy her and erase her genes from Earth. He is the only one who can kill her and the one that must do so. Soko is desperate. Is she really a monster? Why does she have human memories? Why does she have to die? Will she be able to change her destiny and stay alive? from SIH

Two twin sisters contracted a mysterious bacteria from a trip and suddenly gained enormous power. One psycho sister began trying to kill the other because they both loved the same man, while the other sister and her boyfriend began to flee as everyone else became innocent victims...