Over 10 years ago, I saw this anime, so there are some things that I don’t remember anymore, only that there was this teenage kid that had a small magical companion in a green suit and small wings. There was also a girl that went to the same school as the protagonist and she had another magical companion, but this one had a black suit.
The humanoids from the anime I’m talking about had almost an entirely round shape, they looked like flying balls with a head and wings. And their suits were entirely of the color I mentioned before —the protagonist’s had one color blue and the girl had one color black—.