This is kinda creepy, but...oh well...
From my Rika tidbits!
Ishikawa Yuria 石川由梨亜
-- Yuria is 2 years younger than Rika, is a highschool student, and is on her school’s basketball team. She’s really good, back in 9th grade, she was chosen to play in Kanagawa-ken team.
-- Rika says that Yuria is really sweet to her and likes to spoil her.
-- Yuria was the one who came up with the plans in Kibasen for Rika.
-- Yuria doesn’t call her “Oneechan” but “Rika-chan”.
-- Rika’s mom and Yuria always go to MM concerts.
-- Years ago, some people spotted Rika at Yuria's school. It was Sports Day and Rika was there to see Yuria play.
I've seen a website of her school's basketball team. There was no pic or anything but it said she was 163 cm tall. The site was old, she must be taller now. (Some say about 10 cm taller than Rika.)
Some people claimed to went to Jr. high with her said that she was super nice, but some said she had this "my sister is a Musume" attitude.
Do the sisters get stalked too? o_o
Bah. I bet even their dog gets stalked.