"There are still children." he said, tilting his head. The man he'd killed last, who'd killed him, there had been a girl...

Children are acceptable targets still so long as they are not of this world.

Bucky's position is perfectly ingrained into him. Walking beside another denoted being of equal standing and he understood he was no equal to anyone. The only time this didn't hold true was when he was completing a mission, it was the only time the weapon went ahead of the handler.