Nahoya Kawata, alias Smiley, commands the Fourth Division of the Tokyo Manji Gang as a fiercely capable leader. The older twin of Souya Kawata (Angry), he co-founded the Twin Devils Gang prior to their Tokyo Manji alliance. Standing 170 cm (5'7") with a lean 56 kg (123 lbs) frame, his fair, lightly tan complexion contrasts striking peach curls and a signature grin that veils his eyes, paired with dual silver piercings on his left ear. In the Valhalla timeline, his hair lengthens into waves, complementing crisp white suits, black dress shirts, and polished loafers.

Fiercely protective of Souya, he shields his brother from distress while channeling unwavering loyalty to allies—though his bond with Souya eclipses all. A combat enthusiast drawn to formidable foes, his inscrutable smile masks strategic calculations mid-fight. He harbors deep reverence for Manjiro Sano (Mikey), responding aggressively to any slights against him.

Renowned as Tokyo Manji’s elite fighter, his hospitalization during the Tenjiku conflict crippled the gang’s effectiveness, with peers speculating he could have overpowered the Haitani brothers. Later, during Tenjiku’s First Division assault, he outmaneuvered Kakucho, a Tenjiku Heavenly King, pushing past physical constraints to secure victory.

Previously leading the Twin Devils with Souya, his personal quirks include an amber-themed image, clandestine hobbies in manga and model kits (hidden to preserve his reputation), and culinary expertise in crafting restaurant-grade ramen. He disdains messy hair, idolizes Yasuhiro Muto, and dreads his mother’s wrath should he wrong Souya. Aspiring to manage a straight-haired host group, he unwinds at his childhood home with his Pomeranian.

Birth year discrepancies note 1991 or 1989, though his height and weight remain fixed. Valhalla timeline iterations underscore his tactical flexibility and unshakable devotion to both brother and gang.