Mango and Brash, the InvestiGators, are agents of S.U.I.T.
That organization's acronym breaks out to be Special Undercover Investigation Teams. "In a world filled with crime, corruption, and confusion... One organisation works in the shadows to right these wrongs..." It consists of creatures from all walks of life - literally, as you will learn in a moment. The agency is headed by the General Inspector, a human male who is always seen wearing his floppy blue beret and his light gray military uniform. He has a pencil-thin mustache under his metal nose (I was afraid to ask). He sometimes uses the alias G.I.Moe.
In the blurb for the first recorded adventure, we are enjoined to follow "the super spy alligator duo the InvestiGators as they travel through the sewers and fight the forces of evil". Yes, you read that correctly - alligator. These two fellows are anthropomorphized 'gators who have a terrific time prowling around the underbelly of, well, wherever they live and work, to find and combat and, of course, eventually defeat the bad guys. That last part is a given since the InvestiGators are "sewer-loving agents of S.U.I.T. and scourge of supervillains everywhere!"
They are able to accomplish some pretty impressive stuff thanks in no small part to their Very Exciting Spy Technology (V.E.S.T.) which, as that acronym pretty much tells us, comes in the form of vest that they wear on each mission.
When you take a look at both of these agents, you will notice that they really look a lot alike. I mean, pretty much twins, to my admittedly untrained eye. In fact, however, we learn from the Wiki that exists online for them (and how many secret agents do YOU know that have a Wiki?), Mango is "a dark green alligator, his belly is of a lighter green color, he has a curved snout, darker green curved scales from the top of his head going down to his tail, and usually wearing a dark brown V.E.S.T. His eye color is possibly blue" while Brash is "a light green alligator. He has two arches on his head and two on his nose. He has a rectangular snout and four neck ridges. He has a light brown vest and a tail with a few ridges on it."
Brash is said to be "the more hard-nosed and analytical of the duo and would sometimes yell at Mango for his nonsensical remarks". Mango is "the fun-loving goofball of the duo who cracks jokes and witty remarks whenever he can, that being said, he still knows when to be sincere about his feelings and tries to help those that he cares for". Brash is the senior agent of the team having been an operative long before Mango got promoted to the field. Brash had a partner fall in the line of duty so it took him a bit of time to take to his new partner, Mango.
There are a bunch of other operatives working for S.U.I.T. and as time goes by, we are even allowed to follow two other teams for one of their adventures. Key of these is Cilantro, "an orange chameleon, her eyes are yellow, she has only 3 fingers on each one of her paws, her belly is of a lighter orange color, and her tail is long and coiled." She is a dedicated agent and willing to put herself out there for others but is basically shy and tends to find it best to just turn invisible to blend in.