I wish post-Timeskip Marianne was actually confident to match her older, no bags design. Sadly she's still the stuttering, unconfident, crumbling gal she was pre-timeskip.
It's curious. In several shamimomo fanarts, artists portray Momo in an assertive, direct or even seductive way. But, both in the anime and in the manga, it has been shown several times that Momo is shy and dishonest (at the same level as Shamiko) when it comes to showing her true feelings ... Of course, I dont have ploblems with it : )
^ I noticed that too, and I think it's because that's the first impression they got of Momo before she started showing her true self, in the first episodes she was stalking Shamiko to the point she even entered through the window once, and Shamiko was scared of her, of course they developed a lot since then but first impressions matter a lot and she looked to be the deadpan pervert/romantic assertive type of magical girl similar to Homu.