I have a couple of different ideas for characters atm: 

-A transhumanist anti-capitalist terrorist masquerading as the matron of a brothel 
-A procurer of illicit biotech and weapons that operates from houseboats along the Mekong 
-An up-and-coming broker of one of the largest megacorps who becomes involved in the seedy underbelly of the city. Psychopathic tendencies. Could possibly have dealings with the first character. 

Any of these sound good?