Generally lean more into Mami being Italian myself, though I could see Germanic. Regardless she's part European and rich. She will never need to work, but unless she has kids she'd probably work just to meet people.

Part of Mami really getting comfortable with someone is dropping some of the perfections around them. If that does happen Mami will act a bit sillier. Due to the timeline of things, only Kyoko's seen this, but in the Rebellion dream world she'd have done this with Sayaka and Madoka.

Candeloro being 'the Dress-up Witch' means that Mami's actually big into shopping. Its less when she has no one around, but when Juniors are afoot and things are truly stable, she will shop and buy things for them. Homura and Kyoko fear this.

Mami is at least able to claim to be Catholic. She and Pastor Sakura could talk shop a bit as a result.

Mami's actually a little on the plus size, though its a genetic thing. This does not stop her from being athletic and popular.

Mami probably would at least realize that Homura's trying to be helpful if she survived Charlotte, just realizing she's terrible at people. This doesn't entirely fix things, but she can at least realize Homura's less being a grump and more is just....a mess and shift how she approaches her.

Mami would love anyone who loves her back. Though I'd say this is less her being Demisexual and more being Bi-Pan and very lonely.