“I-I really don’t know about this guys- that reaper guy looks pretty mean..”

In this universe this wussy was initiated into overwatch for his technical skills in regeneration health. Though he was miles behind Mercy he did his best. However he did go missing in the ending years of the overwatch foundation and wasn’t found until many years later in an abandoned lab when they were calling all heroes back together. Turns out the dork accidentally shrunk himself when on the edge of being able to regenerate human tissue on the fly by just standing next to someone. But he was too panicked to get help and stayed hidden until found by a sentient monkey. They worked together to find a suitable fix for him- as long as he wore the belt he’d be normal- but it makes him slower and more tired. But he can switch between the two sizes anytime he likes. 

His ult is shrinking and running away like a pleb   giving out an incredible amount of health to his peers around him.

Totally not a rip off of mercy and tracer I swear-