If Duanmu Huai were a Judge from the Istvan Faction, he would surely actively intervene in the war between the Earth Federation and PLANT.
On the contrary, the Amalthean Faction believes that strength is obtained through unity and thus aims to unify all the forces that can be united, to maintain the stability of law and order as much as possible.
Duanmu Huai adopted some of these practices, but he didn't adopt them all. In fact, he did the same in other worlds. For example, in Duel City, he generally wouldn't interfere in the conflict between Seth, Lisas, and Herman's Three Kingdoms until the Demon invaded, and then Duanmu Huai would take action.
It could be said that, from this point of view, Duanmu Huai is half of the Radical Faction and half of the Puritan Faction.
"… All hands, please report to the bridge immediately."
Just then, a hurried announcement came through the broadcast, and both Duanmu Huai and the man with sunglasses lifted their heads.
"What's the situation?"