|Japanese name:||石渡 美結嘩|
|School:|| Chiyozaki Elementary School|
unknown middle school
|Grade:||1st year middle school (Shinohayu)|
|Debut:||Shinohayu the Dawn of Age ch 1|
Miyuka Ishiwatari is a friend of Shino Shiratsuki from Yokohama.
She first appears playing mahjong with Shino and is defeated before the bell rings. She then says it is very rare for Shino to leave early and that she'll she her tomorrow. When Shino has to move with her uncle, Ishiwatari says that she hopes they'll get to play mahjong again together.
Girls of Yumachi Arc
According to Rui Suzuki, she participated but just barely didn't make a qualifying spot.