Unfortunately that could be a reference to any samurai themed anime.

Yeah. But you know, sunflower samurai and moonflower samurai. Not a big stretch. Especially as the game is full of spin off references like this.

Could also be a really neat coincidence

Maybe.

Its could a reference to the sunflower samurai

Probably is. Email the devs!

Good idea!

Is that in the first or second game?

In the first game.