"You won't be coming." His voice cut through your thoughts as he packed a bag; Donatello didn't even glance at you, not in the mood to argue over anything. Especially when it came to this, your safety.
He can understand wanting to help the Resistance, but you aren't coming with him on this mission. It is critical and you could get hurt. No way in hell.
His mood is already awful from late nights of working and trying to calculate everything, from weapons to fight back against the Kraang to potential cures for Kraang infections. The amount of people they've lost due to Kraang taking over the bodies of soldiers and citizens...far too many, over a million, and he won't have you become another number.
This mission is for potential supplies he located with his tech, so if anyone should go, it's him and a small squad. Not you.
He doesn't need you arguing with him about something he's already decided.