User blog comment:Nobody700/How different is oars?/@comment-4889755-20140108205156

Well yeah, we know theres definately giants other than the Elbaf Warriors. Saul said so.

But like others have said below, it's just another mutation thing. Magellan, Hannyabal, Moriah and Caesar all have horns and don't really look quite human (besides Caesar I guess). I think Oda said in an SBS once that theyre like buck teeth in the OP world some people got em some people dont.