As a Monarch, personally going to the frontline is already an unwise move, let alone leading the charge, stepping first into a completely unfamiliar Material Realm, it's simply the behavior of a mind-befuddled brute.
However, for an ordinary Monarch, that might be the case, but for Noah, the ruler of the Dragon Clan, such a behavior is most fitting. Lightening the frontline and leading the charge is precisely what a Monarch of the Dragon Clan should do.
Of course, similar situations are mostly seen among the rulers of the Colorful Dragon Clan. The Metallic Dragon Race tends to be relatively conservative and more composed. The reason why Noah acts this way is because he can confirm that the opposing side is the Material Realm.
Since it is the Material Realm, what is there to fear? Noah now truly wants to know, in the Material Realm, who exactly can harm him.
