I could easily see him as Cloud's mirror... in fact, he acts like a shadow-mirror of sorts. (as regards matters of exertion, I could imagine him as Cloud's "perfect" mirror")
- the way he is defeated, because this is indicative of PoLR.
- his suggested role as a messianic figure.
- his manner of verbal aggression.
- his strategy to defeat Cloud.
- his strategy to defeat the lifestream.
- his rejection of his opportunity to defeat Cloud.