Rain ceremony

-Addendum to the two witnesses post

[6] These have power to shut heaven, that it rain not in the days of their prophecy

There is no rain in A3W,

Both in Higurashi and Umineko rain is heavily featured, between the scenes of Rena standing in the rain and Rokkenjima always being traped in a typhoon, but in Cionia there is never any rain shown at any point in the story.

It makes sense because every aspect of the environment has been completely altered by the 8ms, the global temperature everywhere was set to around 15-25°C and the four seasons stopped existing, there is also no snow or rain anywhere, so it's completely possible that humanity has replaced the natural water cycle with a artificial one, making it not rain for people's comfort.

But there is also another reason for this, it's because the gauntlet would be absolutely useless during rain.

The first reason why is the Rejection shield, it's set to automatically deflect obstacles and weapons coming your way, Gauntlet knights can fly at the speed of sound so 1,235 km/h, at this speed at lazily flying beetle would have the force of a gunshot on you, the rejection shield is set to protect against this by default.

Using the rejection shield uses up a lot of energy, a few times is enough to go into free fall, so the gauntlet knights are advised to not use it often, but what if you had millions of falling obstacles like rain drops pummeling you? Your Rejection shield would get turned on and off instantly draining your energy.

You can set the shields sensitivity to a lower level to ignore this but Gauntlet knights travel without a vehicle so going through the rain at this speed would absolutely not be safe, a single rain drop wouldn't be enough to kill you but heavy rain would feel like being sandblasted by high-velocity water jets. Death by a thousand cuts.

Even going at a slower speed it would be difficult for you to keep your concentration and see anything.

The second reason is the reaper's eye, rain could possibly distort the signal from the 8ms making it harder to get readings. 

This is why rain has been removed from A3W so that gauntlet technology could work. If you got it to rain during combat gauntlet knights would be made obsolete. For example using a rain ceremony.