Right, here's my brainstorming so far.
The Tiger Suns are a street gang. Their emblem is a tiger head in a flaming sunburst. Their members wear orange and black, with feline and/or flaming themes. Motorcycle helmets with a snarling tiger's maw around the visor are very popular.
Their territory looks like someone closed their eyes and fired a shotgun at a map of Hokuko, a seemingly random pattern with focus in some territories and little in others. Those familiar with the street racing circuit, however, will see that they cluster around spots with potential for racing.
Their leader goes by Rakshasa, and resembles his mythical namesake - nine feet of genetically augmented human and tiger muscle. He tries to cultivate an aura of quiet menace, but can fly into destructive rages when provoked. He conducts business in a private room filled with intoxicating incense. With Rakshasa's build and augments it gives him a mild buzz, but a typical person would be high as a kite after spending any length of time within.
The gang's headquarters is a strip club in the inner city, and only the gang's most prominent members are allowed on the top floor, those directly involved in running the gang's various illicit activities.
Of these members it's hard to find anyone more prominent than Domino. The gang's best racer, and in their top ten mechanics, when she isn't shoulder-deep in an engine or waist-deep in strippers, Domino is soul-deep in a vehicle, cyberbrain linked to it's systems. The racer is a full-body cyborg catgirl, and her clothes heap includes several spare bodyparts with different functions.