In the actual battles, all fairies are displayed as the glowing orbs as well. This is more evident in the 3DS version, where it doesn't do the close-up when using their big power like the Switch version does, but it's in both.
Impa looks way cooler here.
Those human fairies are all orbs of light outside of the my fairy menu in the 3DS version, and in the switch version they are orbs of light while in bottles.
I like them. wouldn't mind more stuff like it from the Great Fairies. I also really like the Great Fairies from Four Sword. They have such a nice clean and elegant design.