She's done disgusting things like creating NSFW art when she was underage, joining that Rule 34 site at age 12, and interacting with real minors on that site. She also has a baraag.net account. Above all, she's hypocritical about the NSFW art of various artists. She previously blocked an artist who created NSFW content and spoke ill of this user's art. She once said she didn't like their art and that it made her want to vomit, and even others did. She dislikes artists who create art of girls with giant bodies and said they aren't following anatomy.
Furthermore, this artist doesn't like it when people imitate her art in her style because she detests it.
She even followed a 15-year-old artist who draws adult art. This is quite disturbing and worrying: that an adult user would follow someone under 15 who draws pornographic art, and even worse, follow them on both accounts. Mannie also has another account with adult content, @/SesameSeedoil78.
She even followed an 11-year-old on DeviantArt who does the same thing and is addicted to NSFW content.
She'll also betray you if you defend her content, so be careful.