Here's all of Akio's channels as listed on their main company channel, where Athena's Akio channel is still listed. Athena was their most subbed by a pretty big margin. This is definitely a big loss for them. Also note that the child is pretty far in the lead compared to her genmates.
Also, apparently I'm an idiot and her genmate is Chiyorii Kogara, not Chiyori Ikogara. I'll update the OP later.
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Assuming the walk-out of all of Gen 2 except Nophi and Delfi is true, half of these ten members no longer work at the company.