^ I believe so. Let me remember. What do I know after all?
She was not listed as an act to be on the main stage so I was surprised too. There were people filming but no youtubes yet. Afterwards, I remember she was on the floor (C1 area), doing pictures with fans, so yeah she was an ambassador for Moshi Moshi Nippon. When was she on the main stage? I can’t remember except it was on Saturday when the chairs were still up because I was sitting. Probably prior to the MOSHI MOSHI NIPPON. On Sunday she was not around anywhere because I looked for her and she wasn't there.
EDIT:
from interview
Una: I am performing a few songs, and I am acting as an ambassador for the Brand Aeon, who have just released a special backpack inspired by the randesaru bags school children carry.
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All I know is she performed on Saturday.
She didn't seem to be with the C1 because she was taking pictures
in the aisle between C1 MOSHI MOSHI NIPPON & B3 Sake Summit.