Following GameXplain's video about spirits, I've collected the two instances where Rosalina appears paired up with another spirit:
That's a younger Samus from Other M, a game of course loved and appreciated by all. She's a rebellious soldier in Adam's team in this game if I remember well? She's becoming an adult and loses friends, wins against monsters, stuff like that.
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Next is Daroach, who, if I'm not wrong, is quite related to space stuff and all with his Nebula attacks. I can't think of anything else to go with him, though.
Also, as 3D trophies are now gone I really want to see a Young Rosalina spirit... that'd please, I think, every Super Mario Galaxy player while making the storybook "relevant" again...