Haruto let the reins go slack, and the bikubado lowered its immense head and dove. Far below, the invaders began to scatter: they had never been this far North before, never been this close to the mountains, never been attacked from above.
His mount picked its target and, with wings pressed hard against its own body, plummeted ever faster in the heavy gravity as if to drive itself into the ground. Some Ningen couldn't take it: they'd panic, pull back on the reins, and the bird would flare its enormous wings and abort.
Not Haruto. This is the fun part.