[henshinzero]

This takes place after the 2-part episode with Blade in Zi-O.

Story:
A new enemy just released the Undead again, as he uses the Kerberos card to become Kamen Rider Glaive. With Kenzaki & Hajime normally human again, Blade is need, along with Garren & Leangle. But this time, Amane becomes the candidate for a new rider to join the fray based on Chalice's powers.

Kamen Rider Grail
Name: Amane Kurihara
Gender: Female
Arsenal:

• Grail Buckle (based on Leangle's system)
• Grail Rouser (based on an axe)
• Black Fang (rebuilt anew)
• Rouse Absorber

Story:
After her witnessing Hajime's true identity as Chalice (but not yet knows of him as Joker), Amane decides to fight in his place to protect her family & friends, but joining as a volunteer of BOARD.

Undead that haven't appeared on the old show:
Heart:

• Chop Head
• Tornado Hawk
• Recover Camel

Clubs:

• Stab Bee
• Rush Rhinoceros
• Bite Cobra
• Blizzard Polar
• Poison Scorpion
• Remote Tapir

Diamond:

• Change Stag
• Bullet Armadillo
• Upper Frog
• Drop Whale
• Firefly
• Thief Chameleon

[tomos]

I saw the title and thought it was real, then realised it was the fan fiction sub forum.