Arcee.

She is a female autobot who has a robotic appearance with a pink color.

Appearances... can be deceiving.
Smart and formidable in battle, Arcee is compassionate to her allies but utterly ruthless to her enemies. Her streamlined body and lightweight alloy construction simply mean she's faster, more agile, and ultimately deadlier than most of her fellow Autobots.
A master of many weapons, from cannons to swords, Arcee is a living weapon.