A mysterious word!

I do not know what it is, but it is there.
So, as I play the game, and there, in addition to 11 Lands, it was possible to choose 11 potential Earth players to replace. In general, I chose Hakuryuu.
This story is about how Hakuryuu sent a clone of Tsurugi to by 3 letters
However, before that, he took lessons from the Mask of Kariya... The story is loosely based on Inazuma Eleven Go: Zero.