Ren

The thing Ren wanted the most was to be big,but thanks to her extremely fast metabolism,she was unable to agin a single pound of either fat or muscle,no matter how much she ate or how much time she spend at the gym,all of this changed when she signed up for a clinical trial that promised those sick gains that she desperately craved 

little did she know that said trials were actually a cover for gene splicing experiments,next thing she knew,Ren had been spliced whit shark DNA,giving her some of the characteristics of one,as well as a ravenous appetite,even more,her body was now a natural steroid refinery,whitch meant she would be able to grow as big as she wanted to,and maybe even more

Currently Ren "works" as the pharmaceutical company that did the trials,by work we mean the company pays her to keep quiet about the whole splicing business,as well as further study her and her new body,this all works out for ren,since she does need the money to update to her new bigger life