When Sailor Moon does her "OSHIOKIYO" speech, she makes the symbol for "I LOVE YOU" in American Sign Language.

Sailor Moon’s "TSUKINI KAWATTE, OSHIOKIYO!" speech might have some factual basis. In martial arts, you must introduce yourself before attacking. Not introducing yourself is akin to stabbing someone in the back and is considered dishonorable. Thus, Sailor Moon might feel the need to introduce herself before engaging in battle.

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