u/RecordofArcane

Kamen Rider Grand has a motif of sports, fighting styles, and nations akin to Street Fighter. Grand, the MC, is based on luchadors, Mexica, and Soccer. The theme of this season is peace through competition.

The gimmick items are trophies, which have two slots in the Round driver when slotted in; both sides have handles that can be pulled to hit the bottom of the trophies that act like bells to begin the round. The trophies can be twisted to show a face on them.

Kamen Rider Grand is the successor to the Latin America Kamen Rider title and comes from a long line of proud riders. Riders in this world can draw on the support of the people for power. In this case, Grand, along with other fighters, works to defend the world from the Sybils, star-like parasitic aliens that can take over other people. Grand's real name is Marco Peranza; his main conflict is his struggle with whether he really wants to be a rider or whether he is trying to uphold a legacy.

Grand's upgraded form is Fiesta Form. This is unlocked when Grand learns to actually have fun with his battles and not focus on winning as much. This takes the form of a piñata-themed rider and can shoot hard candies and run at super high speeds. It also heals others.

Grand's Super form is Grand Victor form. It is unlocked when Grand wins his first rider tournament by embracing his own love of soccer and his dream of traveling the world despite what his father may have placed on him. It is a golden eagle-themed form that grants Grand air control, flight, egg projectiles, and increases the power of riders around him.

Grand's Final Form is Grand Globe. Using the Globe Goblet, Grand transforms into a worldwide boar-themed form. He unlocks this by finally deciding to be a rider for himself and that he wants to put his trust in other riders despite what his father says. He gets an unstoppable charge, super strength, durability, force fields, the ability to use wrestling to destroy all malice and will to fight, and the ability to rapidly adapt to the environment.

There is also the secondary Kamen Rider Extra. He is secretly a Sybil who has a trophy themed on dancing. He has come down and parasitized the form of the French Rider, taking his fencing rapier form; he has also slain and taken the karate and katana forms. He only gets one power-up, which is the Grail form.

Kamen Rider Extra explains that the sybils were a symbiotic alien race that was forced into a war when other species took advantage of their peaceful nature to exploit their resources. Now a dying species with no home and a thirst for revenge, the sybils have become the conquerors, hoping to find a new home no matter the cost.

After tricking Grand into passing the trials, Extra betrays him and reveals himself as an alien. He takes the Grail and gains the ability to create thorn constructs to restrain people; he also gets a blade that can see the connections of all things and cut them apart to turn people against one another and cause constructs to crumble. Also, in grail mode, he, as a concept, cannot die. No matter what.

For tertiary. I was thinking of pulling a Kiva and making it Kamen Rider Brand. The deceased father of Grand who we will see in flashbacks akin to Kiva. We learn that Brand abandoned his duties and started a family, only to lose said family because no rider saved them. Blaming himself and the other riders, Brand decided to dedicate himself to the stoic steward of justice with a bull-themed Matador form. His story ends with him dying against Kamen Rider Extra while trying to protect the French Rider.

A Kamen Rider based on Masquerades of the Night. Kamen Rider Masq is an enigmatic man of the Night who goes by the name of Moon when the sun rises. When night comes and the Boogeymen come out from under beds and closets Moon and his troupe of circus performers come out to save the day and protect the joy of the people.

His gimmick in this case is his mask, which is not attached to his belt. In his base form he has the crescent mask which is bunny/magician themed. He gains the ability to make magic tricks in the form of teleportation. He enjoys putting on a show to inspire bravery and courage in others to reach out and conquer their fears.

His upgrade form is based on a beast tamer/ring leader and allows him to access all of his auxillaries with a lion full moon theme. He can use trapeze artist crane, freak frog, bear strongman, and the like.

His super form is when he finally conquers in his inner fear of twisted joy. It is clown/snake themed and has a giant maw on the chest with a new moon theme. This is a berserk form and just absolutely eats damage and allows Masq to stretch his limbs to innumerous degrees, and gain access to acid attacks.

His final form is Lupin Eclipse. This is a pun on wolves and also allows Masq to use two forms one that will devour the day and one that will devour the moon and return things to darkness. This is the form of Masq that understands that fears are inherently human to keep us safe and as long as we don't let them control us they can work alongside us. This returns back to the magician but is more grand. In this form Masq can summon chains, bring his inner fear in the form of a giant serpent to fight alongside him, use fire and ice, devour attacks and send them back, transfiguration, bring fears to life, and summon his circus troupe in a zoo attack.