Thread:Gokyr586/@comment-24661512-20180122093519/@comment-11479355-20180122131955

More often than not, alternate world Riders (the AR World Riders, the Bujins, etc.) have the origins of their powers unexplained. We'll just leave it at that.

Helheim Fruits transforming into Lockseeds is merely a function of the Sengoku Driver when it is formed. Both the general template/functionality of the regular Lockseeds and the Drivers were created by Ryoma Sengoku, so there you have your answer.

Also, you cannot explain anything in Ghost logically. My only answer here is "Ore wa Tenkuji Takeru.