(Aw, thanks! I've had my own headcanon for Mangle for a while [this one], so it was wonderful fortune that Mangle was free when Bright bugged me to join.)
Mangle started to slow as Freddy sped up, struggling to keep all of her limbs fluid and functional. Grinding gears and mismatched parts made for an unhappy animatronic fox. "B̵͟A̷̢Ć͘͜Ķ̢́ ̵̛H̡́ER̴̷E̡͡ ͡͏G͏ȨT!̸ B̶A҉̧D͡ ̨͘͝B̵E͞A͏͟R̕!̵͟͠ S̵̨T҉O͜P̕͠ ́͠CH̵À̕S̀͜ÌN͞G͟͠!̀" the broken animatronic cried out, not knowing what to do other than keep pace. It was suddenly very clear that she would fall behind if she simply continued on like this, and if she fell behind, Guard-Friend would be in danger.
Guard-Friend could not be in danger! Friend stay safe!
Mangle swung back, preparing to fling herself towards the animatronic bear mascot, to reach out and grab at head and limbs and anything that she could reach. Even if she just managed to limply hang there and slow him down slightly, she would be HELPING. Good dog help guard-friend, yes.
"S̷̢̛͞͝C̛̀͞͝R̸̴̨̨͞E̢̡͠͞E̵E͘͘È̷̴͘͟E̢͘͜͝E͟͏̨Ę̵͟͝É̀͘͡E̶̡E͏̨E̕͘҉̡Ȩ̀͡͞E̵͟͟Ę̧͢E̡̡É̡͢Ȩ̨̢̕͡E̴--"