Karyu was one of the members of the 1st place team at the 7th Onigashima CS 3v3 Team Battle. This event took place December 6th, 2020. He runs Dragonmaid, which to many is considered non-meta, although Dragonmaid decks comprised of 7.4% of decks played in the current meta of the OCG.
This is a deck profile copied from the decklist posted by the Onigashima CS Twitter. This is the exact deck he ran during this tournament with no changes. I've transferred it to here to allow English speaking players a chance to pick apart a tournament winning, and tournament viable Dragonmaid deck.