I want to become a Kamen Rider

[Dansaburo Higashijima, Tina Hiiragi, and Ken Fan all want to become Kamen Riders]
What kind of expression lies beneath the mask?
[Traditional knight fiction; no prior knowledge of knights or crossover anime will hinder your reading experience]
"That day, the white ringed beast leaped onto my windowsill for the last time."
"'This is the last time. Sign a contract with me and become a Kamen Rider,' said the creature that called itself Kyubey."
"Okay, I agree."
"If this life is still of use and can help others in some way, then take it."