The following is the gallery for the playable character, Ryu Hayabusa.
Concept Art
Costume Concept with Tina, Gen Fu and Zack - DOA1
Costume Concepts with Zack, Gen Fu, Jann Lee and Bayman - DOA1
Trick-or-Treat Halloween Concept - DOA5U
Halloween 2014 concept - DOA5U
Ryu Hayabusa Halloween 2014 costume concept (reused for his Fighter Force DLC outfit)
Design Contest (2014) - DOA5LR
Ninja Pack Concept with Kasumi, Ayane, and Hayate - DOA5LR
Renders
Promotional Images
Website Background - DOAD
Downloadable Content Images
DOA5U Trick-or-Treat Halloween
DOA5U YAIBA Ninja Gaiden Z
DOA5U Halloween Costume 2014
DOA5LR Halloween 2015 (L set)
DOA5LR Valentine's Day Set
DOA5LR Samurai Warriors Mashup
DOA5LR Attack on Titan Mashup
Pixel Icons
DOA1 (Arcade) Character Select
Ninja Gaiden
Render - Ninja Gaiden (NES)
Promotional Art - Ninja Gaiden II: The Dark Sword of Chaos
Screenshot - Ninja Gaiden III: The Ancient Ship of Doom
Screenshot - Ninja Ryūkenden (OVA)
Render - Ninja Gaiden (Xbox)
Render - Ninja Gaiden Sigma
Promotional Art - Ninja Gaiden Dragon Sword
Render - Ninja Gaiden Sigma 2
Render - Ninja Gaiden 3: Razor's Edge
Promotional Image - Yaiba: Ninja Gaiden Z
Miscellaneous
Screenshot - DOA: Dead or Alive
Screenshot - Dynasty Warriors: Strikeforce
Logo - ZEN Pinball Ninja Gaiden Sigma 2
Render - Warriors Orochi 3