Warning: contains spoilers for Suicide Squad: King Shark #5!
The being known as King Shark is one of the strongest, most vicious and destructive superpowered beings to have joined the ranks of the Suicide Squad. His skin is impossibly tough and his track record of killing his targets by eating them is impressive (if horrific to stomach). But how exactly did Amanda Waller get Nanaue to join the fearsome Task Force X? The answer may have arrived in Suicide Squad: King Shark #5 by Tim Seeley with art by Scott Kolins and colors by John Kalisz, in which readers get a rare glimpse into King Shark's mysterious past.
The Suicide Squad is populated by many metahumans, including Savant, El Diablo - but ordinary humans such as Harley Quinn and Deadshot join the roster as well. But King Shark is in a category all by himself, capable of taking on dozens of assailants at once. Amanda Waller knows the value of King Shark on the Squad, but is unable to inject an explosive into his head. Thus she made a deal with Nanaue's father: Lord Chondrakha the God of All Sharks. Periodically, Waller must allow Nanaue to return home for the occasional family visit - and on this occasion, Waller ha sent the C-list villain Defacer with him as insurance (she'll detonate the explosive in her head if King Shark doesn't return to prison).
King Shark is a participant in the Wild Games - an Olympics-style tournament in which various anthropomorphic avatars compete in gladiatorial combat. The combatants are fierce (and several die in the arena). This is greatly concerning for King Shark's mother, Kaikea. She's furious with Lord Chondrakha that he "...sent [Nanaue] away without telling me! You traded his life to those varua-ino!" She has every right to be angry, as this is seemingly not the first time King Shark's father has done this; at the issue's end, readers see a flashback image of Amanda Waller carrying a much younger Nanaue away from his parents' home.
One can only wonder exactly how Amanda Waller talked a God of All Sharks into giving up his son. Based on the image above, Kaikea isn't happy with the decision at all. Her use of "varua-ino" translates to devil or evil spirit, something which could certain describe Waller in this instance. King Shark is free in the Secret Six series, so he must have been released at one point or another, but taking away a child from a family is a new low for Waller.
Either Waller successfully convinced his parents that Nanaue would be better off elsewhere - or more likely blackmailed or threatened his family. It wouldn't be the first time that Amanda Waller had done something morally heinous. Perhaps in the subsequent issue, King Shark could find himself confronting Waller for what she had done, all for the sake of her beloved Suicide Squad.