Lockjaw is a member of The Inhumans and resembles a giant bulldog. He serves in the capacity of the Inhumans' teleporter and escort to the Royal Family of the Inhumans. Lockjaw has more than one hundred commands through different whistles. Hulk seems to understand Lockjaw. Compared to most of the Inhuman Royal Family, he is limited to where he may go such as the Inhuman Science Building.

Lockjaw was created by Stan Lee and Jack Kirby.