The Heisei Rider Series Question N' Answer Game!

[Blade Dancer]

Kinda, yeah... Maybe I'll watch the first couple episodes of Blade again tomorrow to make sure I remembered correctly.

 

[Sentaifan'07 Xman]

i think the first female rider was Yukina Sawaki (Shouichi's sister in Agito)... but i'm not sure if that should be called a rider...

No, she doesn't count. She was the first to become Agito, but she was killed before it happened.