http://gree.jp/michishige_sayumi/blog/entry/583940991
she said something like "mou ijou desu~" in a formal joking friendly way. Eripon probably just misinterpreted Sayu
"ijou" sounds more formal, and we often write this word on e-mail messages between closer friends as a kind of joke. Of course we often use this word in more formal written things like at work, or news casters often use this at the end of the news together with his family name:
(after finishing the news)
ijou, hayashi deshita.
That's all (for this time, and it was) by Hayashi.
ijou desu. dewa.
That's all (for this time). See you.
Shizu