I realize that, but her profile does not match with what Ayumi has said in the public. If you want to check my info, look for the "Ayu Ready" episode with MiniMoni. Ai Takahashi mentioned that Ayumi could be a MiniMoni member because of her short stature. Ai is 153cm and Ayumi is not taller than her.

Back on topic, people must have eagle eyes lately because I've seen mentions of Ayumi in the bg of other people's performances all over the place, LOL!