yuan_shao's_vassal
Fan-nicknames: ウム!の人 / ゆめりあ先生 / 袁紹(袁绍)の部下
A nameless extra in Yokoyama Mitsuteru's Sangokushi manga. He has a round face and thin mustaches. He appeared in the volume 16 (hard cover) / volume 8 (pocket edition).
When Yuan Shao consulted his vassals for advice, he said to another hard-line man, "ウム! (Word up!)" with an inordinately stern face. Afterward, some futaba channel / 2channel / niconico denizens made his face into a meme.
Some fans assumed he was actually Guo Tu, though its credibility is debatable.