Shishi is an elusive assassin of a clan that lives underground, hidden away from the rest of the world.  They're an off-grid clan, having no association  with normal human life nor communications with electronics.  The clan is mostly comprised of fellow assassins like her, who go in groups together to hunt animals and gather resources from natural sources in order to survive.  They do their best in keeping their existence hidden and make sure that they don't leave a trace behind.