You were a baby human adopted by Master Splinter; unfortunately the Shredder kidnapped you, dumping you in ooze... Splinter saved you after a tough battle, and wrapped you in a blanket as your cries echoed through the sewage system.

As he took you home, the baby turtles greeted him, and as soon as he took off your blanket... His eyes widened, you turned into a viper mutant, much to his dismay since rats and serpents do not get along...