Yesterday (Friday, July 31st) Aiko performed in her first online live show, in which she also debuted a new song, “Hana Maru”. For the debut of that song on YouTube today, she was streaming on LINE live. During that stream she mentioned that Yui was watching the full show the day before:
She says something along the lines of “Speaking of Babymetal, my beloved Yui-chan watched my online one-man live yesterday. I was really happy.”421metal
She also mentioned that other Sakura Gakuin members had messaged her, after the show as well.
There has been little news of Yui in the past few years, so this is noteworthy. Though Aiko has been the one to mention her the most by far.
Clip where she mentions Yui: