Considering that the mech has "Moriya" on it crossed out and certainly looks like it's normally depicted as, Nitori probably gave the Hisou Tensoku new headgear that looks like Reimu's hair.
Is that Goemon?! Didn't you just stick a wig on Hisoutensoku!?A certain kappa's secret baseI shall call it
Hakurei Impact!Now with this your disaster resolution will have impact!Moriya