Masked Rider 555, for the first time, there's a geeky protagonist and the protagonist Riders are geeky transformed to tell the storyline from the perspective of geeks, as well as having complex feelings, at the end of the show The protagonist begins to sand down, and in a later drive it is confirmed that the protagonist is dead.
Masked Knight Electro King, Knights written by Yasuko Kobayashi, the plot is funny but also hides a lot of deeper meanings, time-traveling trams, disrupting time and space of the Altered Demon God, the second Knight Zero Nos is even more of a tragic figure, transformed at the cost of his presence in the memories of others.
Masked Knight Kiva, the story unfolds in two timelines, one is the protagonist of the time where Red Wataru is, the other is the protagonist's father in the timeline of 20 years ago, the protagonist himself is a hybrid born of a human and a cadre of strange people, so the protagonist has been troubled by his own side to stand on that side.
Masked Knight W, the knight who fights in the Windy City, destroying all existences that would make the city cry, the first knight to be transformed by two people, the relationship between the two hitchhikers and the villain is the main thread.
Masked Knight Amazons, gaiden class works, based on the masked knight amazon, the so-called survival means to eat, to eat means taking other lives, survive while fighting!
Actually, all the other knights have a deeper meaning than just these ones, maybe you have to watch carefully to realize it