My fourth pick would be Lieutenant Riza Hawkeye the adjutant and personal bodyguard to Colonel Roy Mustang in FullMetal Alchemist. She is a sharpshooter and she specializes in firearms. She is his right hand. Riza is strong smart and courageous and a badass. She is an invaluable asset to the Colonel.
Riza is an amazing soldier and a great support to her allys. I believe she is inspirational because she does not let anything get to her and she is strong and intelligent. She comes up with solutions quickly when in trouble and does not let anyone get in her way. That is why I chose Riza as my fourth.