New Neru and old Neru

Where have we seen this Nagahama Neru before?

Saitou Fuyuka, Nagahama Neru, Oda Nana (l-r)

Perhaps it was here....

The upper photo is a new photo altered by the app SNOW. The lower photo is idol otaku Neru, in middle school or early high school, out with a friend to greet her oshimen Itou Marika.

Checked shirt, Paisley-ish headband, backpack. Is this an otaku costume?

Above Neru's head is her then-nickname "Nelson" (Neruson)