Also, I’m thinking that I’ll name Male Hinawa Tanega -shortened from Tanegashima, another name for a Japanese matchlock gun (you know, like Hinawajuu)

Either that or just leave the name as Hinawa?  The name itself isn’t gendered like Lucas or Claus, and it’s so deeply associated with the character that it admittedly feels weird changing it.  ( Haha, if that name doesn’t change, then does Flint just stay as Flint? XD )

Or maybe if Hinawa’s name does change Flint can be called Mique or something since it’s another gun term looselely related to flintlocks and stuff? XP  Or Boyer just for the lulz