User blog comment:Fedora Lord Para 348/The True Power of Madoka/@comment-28218157-20160413110753/@comment-27530968-20160426060349

It's not exactly canon when it comes to the main Madoka universe(s), but the statements of the Madoka Multiverse on the other hand, do.

It also takes place with in the Madoka Multiverse, so it should be canon.