She's an ESFJ (Myers Briggs type), which is rare to find in anime (And when you do find them, they usually die - I guess Mami's no exception). She's so much like me. She's motherly, a little bit clueless, and all round lonely. She's easy to please and has a deep heart. She's girly and blond and her death was tragic. And, in the movie, she is the toughest after Mami, even defeating the brooding Homura.
I love seeing personalities like mine actually, rarely come across in anime and truly have redeeming qualities.
Other ESFJs I've seen: Misa Amane (generally disliked or looked unfavorably upon, and she dies.)
Shirley from Code Geass (Dies. Of course.)
Koizumi Risa from Lovely Complex (lots of emotional angst as she's unloved by the guy for way too long. At least she doesn't die.)
Maybe Ui from K-On? (People aren't sure on that one. But she's not even a main girl.)
and Tomoe Mami. There just aren't any others. I really didn't like Code Geass at all, so I have no attachment to Shirley, but she was still awfully mistreated.
I like how Mami is at least given respect as a veteran, and then brought back to amaze all in the movie.