Also, note that the user wants to skip brands and names. So "Sister Blanc" remains as is, or do they want synonyms for "Sister" and "Blanc"? Since Blanc is a name, it should stay. So maybe just "Sister" could be synomized. But the title is "Sister Blanc and the Sealed Succubus," so perhaps "Sister" stays, and "Sealed Succubus" becomes Imprisoned Succubus. But the format should be each term with three synonyms. Hmm.
"Story of Sister Blanc": "Story" story.
Next sentence: "Her story is intertwined with that of the sealed succubus, a being of immense power and allure." "Story" could be narrative. "Intertwined" might be interwoven. "Being" as creature. "Immense power" could be tremendous strength. "Allure" as seduction. -ENG- Sister Blanc And The Sealed Succubus -RJ0... -UPD-
"It is said that Sister Blanc, through her unwavering determination and possibly with the aid of ancient artifacts or forbidden knowledge, managed to bind the succubus." "Unwavering determination" as steadfast resolve. "Aid of" as assistance from. "Ancient artifacts" as forgotten items. "Forbidden knowledge" as forbidden lore. "Managed to bind" could be achieved in capturing. Also, note that the user wants to skip brands and names