One of the six "Kings" guarding the aircraft carrier that is Takeuchi Sora's base of operations, "Blaze Breath" Alexander Locke is a Gravity Child in Genesis. His moniker is "Burn of Wyvern".
Although said to be a powerful rider, claiming to have a battle level of 262, he is swiftly dispatched after being lured out of his designated arena by Aeon Clock.
He appears to be a Flame Road rider that carries a gun with a wyvern on it. His 'Shadow' is a Wyvern, as befitting his moniker.