Sierra's skin was partially burned away revealing her metal body underneath. 3 appeared in front of her and kicked her really hard in the chest repeatedly.
(Continuing what went on last night.)
3 continued to kick Sierra in the chest, which was starting to break in half. Sierra desperately raised her cannon to defend herself but 3 took hold of it and ripped it off, tossing the arm in a nearby bush. With one last good kick, Sierra's upper body broke from her hips and 3 slid her lower half aside so the core holding her soul could fall out.
"You really should have just died peacefully my dear, than I wouldn't have as big a mess to clean up." He put his saxophone to his lips ready to finish her.