Ryoko Akiyama was a Yomiyama North Middle School's student from the 3-3 Class of 1983 along with Reiko Mikami, Ryoko's best friend, and Katsumi Matsunaga. She appears exclusively in the manga and never appears in the anime, but she was never mentioned.
From the Another wiki
Despite being manga-exclusive, I managed to create a LoRA from a few panels of the manga and gave her a unique flare of her own.
I thought folding forehead into the tag would give her a forehead, but you may need to add it in.