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Quote:

Originally Posted by Kamen Rider Die

The weak part, though, was all of the Kaixa stuff. Way too many unanswered questions in this one. How did Kaixa defeat Houjou? Is Houjou still alive? What was Kusaka doing in that weird warehouse? Why didn’t he answer his phone? (Other than, it was Takumi and he didn’t care to?) Where did he get the Accel watch? I get that this will all probably be dealt with in the next episode or two, but it’s such a weird thing to skip over that the Accel stuff in the end didn’t completely work for me. It was fun to watch, but the Kaixa stuff was just too mysterious to stay unaddressed this time out.

Of all the ways Riders have received power-ups over the years, Kusaka just chucking the Faiz Axel at Takumi's head is one of the all-time greats.

As for the rest of that, I don't remember how much explanation we actually get. This is one of Inoue's biggest problems as a writer; I don't think it gets that bad on Faiz, but you can definitely consider all this missing exposition as a small teaser for Kiva.