Crux and Lomar should be the ones who are leading because they made the Gjhallerhorn, what they did was after the twilight gap they wanted to honour the fallen guardians not just by mourning them but by making a weapon out of their armour so that they can fight again. The name Gjhallerorn in some civilisation signifies Ragnarock (it means someone -blam!-ed up and is about to be killed). And who else sacrificed themselves at the twilight gap? The Iron Lords, therefore with their armour we will make the Iron Gjhallerhorn! So technically we are not just getting a skin, we are going to craft a new weapon, just with the same name.