|Romaji||Kakeru no Sensei|
|First Appearance||Episode 1 (CFE01)|
She is a tall woman with long bushy brown hair and purple eyes. She wears visible lipsticks. The outfits that she wears often is a purple sweater and inside is a white shirt. She wears black skirt and shoes.
She appears to be a rather strict person but after being attracted by Riki's books about history and ruins, she becomes a fan of mystery just like Riki does.
Ms. Yamashiro took away Riki's book while he was supposed to pay attention.
She makes the cameo appearance along with Akira Saiga in the finale credits. She is seen in the museum checking out artifacts.