Watching the anime, it took me a while to really wrap my head around what Kirari's character was supposed to be, what with the searching for cute girls and happy-happy and such. I know what it looks like as goggles on, but for a series that keeps the subtext so far on the down-low that I doubt they were really aiming at "predatory lesbian with a thing for children". But I eventually figured out what they were going for.
She's a preschool teacher!
It makes sense. All her actions are like trying to encourage and win the trust of small children in her care, and she aims at being the sort of idol that age group would have fun listening to. A little embarrassing that it took me so long to Get It.