Plachta

Plachta (プラフタ) is the deuteragonist of the The Alchemist of the Mysterious Book. Plachta is an old book kept by Sophie's grandmother. When Sophie took the book out and started writing alchemy recipes within it, Plachta emerged into her humanoid form. Having lost most her memories and powers, she and Sophie decide to pursue alchemy to restore her to her proper form.

She appears as a playable character in Musou ☆ Stars.