More than just a faithful pet, Lockjaw is the incredibly powerful bulldog with the ability to teleport long distances and a fierce loyalty to Black Bolt, Medusa, and the rest of the Inhuman royal family of Atillan. With a glowing antenna on his head and some really unique powers (most likely from the Terrigen mists), Lockjaw is not only an indispensable part of the Inhuman world but of the Marvel one as well.
Lockjaw is the escort and companion to the Inhumans' royal family and has been at least since the princess Crystal was a young child. According to some reputable sources, the Terrigen mists mutated him from a child into his current dog form and gave him his powers. Lockjaw has a special fondness for Crystal and is highly protective of her; he has a similar relationship with her daughter Luna. He also shares a connection with the Fantastic Four's Thing (Ben Grimm) and with the Inhuman king, Black Bolt, perhaps be due to the antennae each have on their brow. Lockjaw serves as the royal family's unofficial transportation. A very good boy, he will almost always do what he's asked by Crystal, Luna, or Black Bolt. The other Inhumans may have to be more persuasive to gain Lockjaw's cooperation, though he's generally reliable in emergencies.