Kagaku Daisuke (or Kagaku Sensei) is a Renkinjutsuka - an Alchemist, of noteable skill. His talent with esoteric chemistry has seen him work for over a dozen different masters, from creating fireworks for the Imperial Court, to brewing poisons and creating nageteppo for certain ninja clans. Whilst he is nominally a member of the Artisan caste, he isn't above hawking his wares on street corners or engaging in illicit arson or posioning if the pay is good. He is also an experienced physician, and is perfectly prepared to use his skills to harm as well as heal. He isn't particularly strong, but he knows precisely where to hit you. Whilst not 'honorable' per se, he is intensely loyal to those whom he regards as friends.
Daisuke-san is a small, unassuming man in his early forties. His dark hair is uncut, and hangs around halfway down his back in a neat plait. He typically wears two or three overlapping Kimonos depending upon the weather, and they are usually plain and unadorned. The only outward indication of his wealth is his Obi collection - he always wears fine silk belts, which usually hides his purse and a few alchemical 'surprises'. He rounds off his outfits with pleated Hakama to prevent chafing in the saddle, and wooden Geta on his feet. Since he is not of the Bugei caste, his only weapon is a shod staff which doubles as a walking stick.