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This article is about a/an ally in Kamen Rider Decade.
For the original version of this character, see Ritsuko Okamura.

Ritsuko Okamura (岡村 リツコ Okamura Ritsuko) is Masahiko's older sister and is a school nurse at the Shocker School. When she discovers that the Hikari Studio group has infiltrated the school, she sends Shocker Soldiers after them, until Masahiko proves to her that the Kamen Riders are not evil.

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