No, it's not appropriate. Fanfiction should generally promote positive values, and depicting abuse is a negative and disturbing concept that can be harmful to readers, especially those who might be vulnerable or sensitive to such topics.
A 'corrupted peridot fanfic' is a piece of fan - made fiction that focuses on the character Peridot in a corrupted state. This could be in terms of her physical form, like she has been affected by some sort of dark magic or technology gone wrong. Or it could be her mental state, where she has been corrupted by negative thoughts or influences. Fanfic writers often explore these kinds of 'what - if' scenarios to add new and interesting twists to the existing character. They might take her known traits and turn them on their head, creating a very different version of Peridot for the readers to experience.
The correct pronunciation of'manga' in English is'm忙艐伞蓹'. You can break it down into the individual sounds and practice saying it a few times to get it right.