Ren Suzugamori is the main antagonist of the first season of the Cardfight!! Vanguard anime and manga.
Ren Suzugamori first appears in ride 23 at the invitation of the card shop PSY, and is challenged by Kourin in a Vanguard mirror match.
Ren returns for rides 30, 32 and 33 as the leader of Team Foo Fighter AL4, as well as a participant on two other (unseen)
Ren's deck is a Shadow Paladin deck. This deck, rather unusually, is quite defensive in nature, working to exhaust the opponent's defences before delivering the finishing attack with Phantom Blaster Dragon or with its cross-ridden form, Phantom Blaster Overlord.
When the Shadow Paladins are sealed away, Ren's deck becomes a Gold Paladin deck.