General traits: One of the smarter puchidorus, it likes to play practical jokes on other puchidorus and on humans. It is a real glutton and even more addicted to onigiri than Miki is, so it often gets into scuffles with Miki about onigiri. It sleeps a lot and not even loud shouting will cause it to wake up. It often gloats about a certain difference in physique between itself and Chihya.
Seasonal changes: When summer comes, it sheds its blond hair and grows brown hair. Moreover, its ahoge becomes heart-shaped.
Calls: "Afu!" () and "Na no!" (). In brownhaired form it uses "Hanii!" () at Makoto and Producer.
Other things of note: The accepted unit of length among puchidorus is 1 Afu = Afu's body length. For example it is used when measuring swimming distance or estimating how far away a fellow puchidoru is. It is unclear whether or not Afu's ahoge is included in 1 Afu.
Discovered by: Ami
Named by: Ami
First appearance: Chapter 1
(Source: laburey.webs.com)