Moriya has a very long face ending in a pointed chin, he also has a long curved nose. He has hair that falls below his jaw that curls at the end.
Moriya seems polite but it is revealed in his thoughts he has a very negative view on others. He can be quite snippy at times. Moriya believes manga should be about the art and creativity, and you shouldn't worry about popularity because you won't get anywhere if you do.