「はらぺこ魔理沙のしあわせごはん」の5話目で
人里で迷子になっている妖夢を魔理沙が案内してあげたシーンがありますが
妖夢が空を飛べば一発で居場所がわかるはずなので
たぶんこの解釈が一番正しいと思います(名推理)

上着の白いラインの入った服を着てる魔理沙がとても可愛くてすき

"Hungry Marisa's lucky meal" chapter 5:
A scene where Marisa guides Youmu who got lost in the human village.
Youmu could try to fly but she doesn't seem to realise that, perhaps this is the most logical explanation I thought(pretext)

With those clothes with the white lines on the vest Marisa looks super cute, I like it.