Yeah, i'm curious as well. Could be because they debuted after the 2 other groups so they don't have a song for them ready yet.
^
I forgot how they talked about each group specifically when they were announced. So maybe I overstated it in saying "Beyooooonds was pitched..." Since, like you say, only half of Beyoooonds was pitched that way... but Kobayashi is in neither RFRO or ChicaT.
The Only One audition which brought on Kobayashi was "whatever your special skill is." I still think it's fair to say that the group she is in, is fundamentally related to the audition that filled it out.
I see. I was completly lost wit hthe Only You auditions so i was like "Meh, wake me up when the new members are announced" so i didn't know they also asked for girls with special talent for the last group.