Franklin was born to Margaret and Steven Miller, a pair of CPA's who run the aptly named Miller and Miller CPA firm, the second of three children (all boys). There was little doubt to anyone who cared that the children would grow up to enter the family business, each of them possessing a dry personality and an aptitude for number-crunching and fun avoidance.
Franklin went to college after a relatively uneventful high school career, attaining his college degree in Accounting while working part-time at his parents' business. His older brother (Walter) would always hand off the worst jobs to Franklin, typically having to help audit a goblin casino or a gnomish bar, but the young man persevered, thinking that when his younger brother came on board the bad jobs would continue to roll downhill and he would finally get to have a break from the shrieking clients who would insist that he calculated their taxable income incorrectly. The ledger never lied.
About a year ago, the younger brother (Gregory) graduated and got his CPA license, only to engage in the same conduct as Franklin's parents and older brother. Franklin would want to scream at them, but would just mildly nod and accept the work that they themselves would rather not do. Which seemed to be most of it. Franklin frequently found himself the lone member of the family working after-hours and on weekends.
Not long after, Franklin started taking martial arts classes at a local gym, trying to blow off steam after his days of being his family's waste bucket for bad jobs. He was hoping the training would also teach him assertiveness and how to stand up to his folks, but that part has been hard to come by. He has progressed rather well with the physical aspect of it, though, becoming a rather decent martial artist and getting a physique impressive enough he had to work to hide it, lest he receive disapproving stares from his physicality-averse family.
Ready for a change, Franklin is looking to adventuring to spice up his life and give him a renewed sense of purpose. He had been rather fascinated with the idea ever since he had done an adventuring elf's taxes a couple years back. The swings in cash flow were certain to cause at least mild anxiety, but working as he was now would definitely cause health problems several years down the road. Franklin was finally ready to take the plunge, if only he could work up the nerve to tell his parents he was quitting. Maybe he'd tell them he was going on sabbatical, instead.