Tiefling

the tieflings are people with fiendish legacy, tieflings are extremly identifiable if you ever read about them even tough they come in more variety than most races, with variety in color and horn shape, some have tails some do not, some teath are an exact analog to humans and some have jagged horrid teath.

Outcasts and hermits
tiefling individuals and tiefling familys are usually unwelcomed as permanent residents of a city and so most tieflings are either always on the move from place to place or live in isollated tiefling communitys.

Variety in bloodline
alltough all tieflings come from a mix of fiendish and human bloodlines there is imense variety in those.

a tiefling ancestry can contain either a demon or a devil and many diffrent types of those, which determine their skin color.

also there are generaly three types of tieflings:

pureblood - both parents are tieflings

halfblood - one tiefling parent and one human parent

hellblood - one fiend parent and one human parent

Tiefling traits
tiefling traits can be found in, players handbook page 43.