Amanda Waller (Viola Davis)
Amanda Waller is literally the boss. Highly intelligent, relentless and almost sociopathic, she’s a government official with her own agenda, and wields the means and resources to neutralize any threat to that agenda that any metahuman may pose. She is ambitious and powerful to the extent that, in the source material, she has been seen to intimidate even Batman into submission.
Suicide Squad – also known as Task Force X – is Waller’s initiative. She handpicks the Squad members, she gathers them for training, and she gives the orders. If those orders aren’t followed, Waller decides whether or not those Squad members are executed. Their lives are literally in her hands.
Rick Flag (Joel Kinnaman)
In the source material, three generations of the same family have held the name Rick Flag – a grandfather (Rick Flag Sr.), a father (Rick Flag Jr.), and a son (Rick Flag III). It is possible that, despite the lack of a suffix on his name, the version appearing in Suicide Squad will be a modernized variation of Rick Flag Jr. – something that is supported by the presence in the cast list of a character named “Grace” – who could be a nod to the girlfriend of Rick Flag Jr., Karin Grace.
Flag is a non-metahuman in peak physical and mental condition, trained to expert-level in military, special forces and guerrilla tactics. He is the Squad Leader – an employee of Amanda Waller – which puts him in direct conflict with the bigger, male personalities on the Squad, such as Deadshot.