Thread:ZeroTwo64/@comment-39897997-20200102220318/@comment-31835132-20200102224001

Immortality (Type 6) is a power held by every magical girl.

Gen Urobochi has said in a tweet that if a magical girl's body was completely destroyed, her consciousness could reside in the Soul Gem and use magic to emulate the body's senses. However he said eventually it would have been "unable to do so and lose awareness".

https://twitter.com/Butch_Gen/status/59241298158288896

Translation: ''It's also the case that, if a magical girl who didn't know the truth of the Soul Gems genuinely thought 'I'm dying, I'm dyyyiiing!', her Gem would almost immediately blacken. Also, a girl who's been reduced to just a Gem could use magic to gather information and substitute for her regular senses, but could eventually become unable to do so and lose her awareness.''

In Puella Magi Kazumi Magica, we can see cases of magical girls creating bodies as a result of their magic: an example is Kanna Hijiri, a duplicate of the magical girl Niko Kanna, but with a different set of memories.

It isn't stated anywhere that Mami can create duplicates... however, in the movie Rebellion, it is highly speculated that Mami created a decoy with her ribbons during her battle with Homura. After that duplicate was shot by Homura, it turned into ribbons and trapped Homura. It is very unlikely that Mami herself turned into those ribbons.