You have served a "master" at one point in time in your life, probably unwillingly. Your master could've been an evil warlord, a king/royalty, and maybe even a crime lord. Maybe you were born into it or captured. If you were captured were your parents killed? or were they also captured? same question for your siblings and/or townspeople. Was your town/home burned? What slave work did you do? Entertain? Mine? Be a Servant? You have escaped your servitude, where will you go? to find your homeland or family? Since escaping you've probably decided to go adventuring, possibly trying to find your family, homeland and most likely started a job of sorts. You've seen evil and little good and may be out adventuring to liberate slaves.

Skill Proficiencies: Athletics, and choose one of either Stealth or Persuasion.

Tool Proficiencies: Thieves' tools

Languages: One of your choice

Equipment:  set of common clothes, a pouch with 5gp and a weapon or item gifted or stolen from your master, with your DM decide if it is magical or not

Suggested Characteristics

The greater part of a slave's life has revolved around the wants and needs of another person and they are not used to caring too much about themselves, except for how they will make it to the next day. Their newfound freedom offers broader horizons, which can be exhilarating, challenging or nerve-wracking. Serving a master for many years tends to make slaves cautious, patient, self-effacing and observant. Many have waited years upon years for the chance to break free from their bondage. As such, these (ex)slaves tend to value freedom as the highest ideal. On the other hand, there are those who feel it is part of the natural order of life that some are slaves and some are masters.