User blog comment:IamJakuhoRaikoben/Sorcerer Magazine, Issue 41: May 2015/@comment-25111584-20150602132552/@comment-6152051-20150602135341

Quote and unquote: "He'll just burst out of any bubbles Minerva makes", implying that someone managed to escape her spheres. So I asked for a proof that Erza and Kagura managed to escape ~ And essays are fun!