Kakukaku

Kakukaku (カクカク, Blockhead in the Viz Manga) is a man who was seen among the people that are talking about the attempted murder of Iceburg. Oda stated that Kakukaku is an erudite and gets scared very easily, unlike Kaku of CP9. So far, no connection has been mentioned between Kakukaku and Kaku. He only appeared in the manga, and his first appearance is in Chapter 334.