[ Riza followed Shiro's gestures and tried to picture the "star ship" he had in mind. First, she thought of a cruiser seen around Aerugo's busier ports -- one that took to the air. Then she thought of a locomotive with biplane wings. But those two things would cause a lot of aerial drag. Or perhaps...

Her efforts at imagining Shiro's description showed on her face, lines between her brows, and her lips in a slight pout. ]

I'm picturing a giant hollow bullet that pierces the clouds. [ Sharp, Riza made a handgun-pointing gesture, as if to target a particularly fluffy cloud ahead of them. Muscle memory served her well, even if she didn't have any firearms at-hand. ] But you would need a gun large enough to power it. Alchemy is able to produce such energy, but the array would have to quite large and the source plenty.

[ She was no alchemist, but she knew enough about the principle of equivalent exchange, and how seemingly little could produce large (and destructive) results. She brought her hands down, tucked that thought aside, and mentally erased her bullet-ship. ]

But a bullet isn't dirigible once fired. [ Her smile returned shortly -- because he had also said 'soup can' and she couldn't help but picture a flying soup can now. ] You've given this a whole lot of thought, I see.

[ Hayate took to running ahead, curious over a crawling starfish. He gave a sharp bark and waited for the two to catch up. ]