The characteristic that Clovis and Rollo have in common is that both effected great political changes by converting to Christianity with their vassals.
Clovis I was the first king of France in the year 481, being the first to dominate all the Frankish nch peoples and unify them in the year 509. An outstanding aspect of his life is that he converted from paganism to Christianity after winning a battle against the Germans.
On the other hand, Rollo (846 - 933), better known as Rou the Walker, was a Norwegian who is considered the first leader of Normandy. An outstanding aspect of his life was that he converted to Christianity so that various territories of France were granted to him.
According to the above, the aspect that these characters have in common is that they both converted to Christianity and made political changes as a result of that decision.
Learn more about Christianity in: https://brainly.com/question/3749222
#SPJ1