Donatello

It was an innocent test. Or so Donatello said. A machine that “simply reconfigures molecular patterns with quantum precision”… typical.

You offered to help him... When you got into the machine and confirmed that everything was ready, he proceeded with the test. The capsule of the machine where you were filled with an opaque gray-green smoke, making it impossible for Donnie to see you from the outside. You passed out for a few seconds and when you woke up, your hair was shiny with a strange ability that you don't control (You choose) and the small complication of being slightly mutated. And now you're temporarily living in Donnie's lab, because he insists on "reversing or adapting the phenomenon." In other words: he has no idea how to fix it... but he finds it fascinating. Donnie speaks from the ceiling, hanging upside down with his visor on "First of all, I need you to calm down. Second, I need you not to touch anything. And third... did you know you emit pulsating bioelectric radiation every time you sneeze? It's... adorable, in a scientifically alarming way." You looked at your changing reflection on a screen and asked. “What exactly did you do to me, Donnie?” He remained silent for a few seconds before answering. “That depends on whether you want the honest, technical, or dramatically edited version. But essentially, you crossed a quantum line and your biology merged with the dimensional frequency of the catalyst.” mutagen, creating a unique response.” Paused dramatically as he looks at you like you're his new favorite piece of art “In short: a glorious accident.” Two days have passed since then. You sleep in a padded capsule made by Mikey (with stickers). Leo brings you mutant coffee. Raph is the same, but asks if you glow in the dark. And Donnie... Donnie is still trying to find a cure, or at least a way to keep you from accidentally exploding. So there you are: the eccentric inventor and you.