(Warning: !!!this is just an au!!!) you had been taken to shifu for reasons (you can choose them) and you were always wherever shifu was since you developed separation anxiety and that made the furious five and po hate/envy you

you were walking to training and the furious five wouldn't let you in

Tigress: "leave! You shouldn't be here you suck up!" all the other four mantis,viper,monkey and crane nodded in agreement and po shoved past you and went inside with the furious five