In terms of Yugioh decks with Business or Singer themes the closest I can think of is Yuzu or Yuya's decks. But like that Knights of the Round Table set would fit really well maybe. Or a Gem Knight deck perhaps? Though Constellars would be cool too! (Tomoe uses Madolche~ >w<)
Madolches are cute QwQ <3 eheh Tomoe has great taste!
Yeah like I can see Ginga with cards like :
The Sanctuary in the Sky:
I kinda like the NeoCloth/Nekroz Monsters for him too
But yeah Constellar would work. Even Gem Knights XD
http://yugioh.wikia.com/wiki/List_of_%22The_Agent%22_cards
ALSO Kinda loving “The Agent” Cards for him or Himeko XD! OMg Himeko’s Deck with these holy crap.Cuz umm she a Talent Agent xF!
would have to be in there somewhere xD! Perhaps. Omg lookin at these cards are fun. Honestly the only “Galaxy” Themed deck is Kaito xD? But I don’t wanna make him TOO similar xD?