Left Mask: The left mask on the helmet.

It is said to be particularly compatible with animal-based Wonder Ride Books. It has the property of enhancing the physical ability of the user, and by exerting the power of the Wonder Ride Book contained in the midshelf of the Seiken Swordriver, it exerts various abilities. In particular, it is said to be compatible with the God Beast-based Wonder Ride Books. It has the property of strongly acting on the sword technique of the user and exerts various abilities by applying the power of the Wonder Ride Book stored in the right shelf of the Seiken Swordriver.

Right Mask: The right mask on the helmet.

It is also a blade with a sharp edge, and can also be used in battle. It has the role of adjusting the state of the Kamen Rider and the Seiken, and adjusts the power balance between them and cancels transformation in an emergency. It is installed on the top of the head as a proof of being selected by a Seiken. Sword Crown: The blade on the forehead.These are pieces of equipment that come standard with the belt assuming that they aren't replaced by pieces from the Wonder Ride Book armor:

Saber's also currently running and it has some pretty good feats imo, so I'd also encourage discussions about that too. I'm currently working up a respect thread for Evolt and I'm going back to revisit Kuuga soon after, so if I find anything particularly interesting to discuss (in fact I do have particular subject I've constantly been debating on myself about), I'll mention it in this thread if there's enough life to it to keep it up. There's also a sizable amount of KR on reddit's respect threads, which is the main platform of where I post respect threads (example being Build's RT here), whether or not you like respect threads like that is up to you (since there isn't a lot of calcs or hard analysis going on there admittedly) but I'd argue they're good for gathering and having a list of feats ready and my biased feelings about them but that's me. Should probably start with some threads in the past that have been made here before, this old one that has some Kamen Rider but mostly just covered Sentai until the OP stopped and this Zero-One specific one that hasn't been posted in (although that's most likely because the OP of the thread stated that they haven't watched the entirety of the show yet IIRC). Oh cool, I was originally gonna make a thread like this due to the suggestion of another person around here, but I guess this works too.

Kamen rider kuuga helmet