Baku the Voiceless is a silent vendor who appears only in New Game+. You find him on the small island at the centre of Lake Izuhara, in Ariake. He sells armour, dyes, charms, hats and masks for Ghost Flowers.
Baku cannot speak and only grunts or moans. His red and black outfit and four-faced mask make him easy to spot.
His charms include the Charm of Canine Recruitment, which lets you pet a Mongol dog and make it your ally. The Charm of Ghostly Fury is another good pick. Masks include the Adachi Dragon Mask.
Bataar
Bataar is the Mongol general behind the attack on Komatsu Forge. Jin and Yuna fight him while defending the forge in Hammer and Forge.
Bettomaru
Bettomaru is the master of the Way of the Flame who lives in a dojo at the top of Mount Jogaku. You climb through a snowstorm to duel him in the Mythic Tale The Undying Flame, and he teaches Jin the technique during the fight.
Black Dye Merchant
The Black Dye Merchant is a hidden vendor in a cave east of Kawamata Village in Kushi, Toyotama. He sells deep black armour dyes and cosmetics for Flowers.
Black Hand Riku
Black Hand Riku is a blind former pirate captain who hides on Iki Island with his armour, the Sarugami Armor. You duel him at the end of the Iki Mythic Tale about his legend, and beating him earns you that armour.