In the world of Cradle, All is at peace. The snipes float around, chirping in harmony, The strangers laugh at the silly knights, and the other knights, they use the auction house.
But something is amiss. In the inventory of every character- Something is amiss. All of those spare weapons and armor, those minerals and materials- the costumes and accessories sitting unused- But my, why did that vial fly straight? It should have hit the ground!
Most knights inventories weigh a lot.
In fact, there are a lot of things that would be heavy, if you know anything about gravity.
A single knight can carry infinite amounts of items, with absolutely no drawbacks.
Is it truly possible, that there is no gravity on Cradle?
Vials fly straight, and not at an angle, curved to the floor. That is a major hint, to me.
But does anyone else feel strange, when they put their Combuster, Glacius, Voltedge, and Leviathan blade in the same weapon slots, and see that you're using them one handed? That, surely would be very heavy. But to add to it all, You could move around very quickly with the right armor, even if you were carrying the heaviest weapons, in all four slots.
In conclusion: There is no Gravity on Cradle.
You're forgetting one small problem. We can't carry everything in our inventory, at least while in the clockworks. We have to use an arsenal station to change equipment, otherwise we can only carry four weapons, an armor set, a shield, a costume set, and two trinkets at the most.
Now, you're always carrying your whole inventory in Haven, so you can argue there is very little gravity in Haven, but there must be gravity in the clockworks if you're only able to carry a limited amount of items. Furthermore, we can consider the vials exploding at a certain distance to be akin to them hitting the ground.
In conclusion, I say there is very weak gravity in Haven while there is stronger gravity in the clockworks. Also if there was no gravity the knights would fly off into space, so there has to be SOME form of gravity holding the knights on cradle.