Matasaburo

Fan Fiend (マタサブロ Matasaburo) is native to Air Man's stage. Just like Air Man, he has a fan and will blow to try to send you over the edge. There is a similar enemy in Mega Man 7 (see below) except he can change the wind's direction; this means he can not only push you away, but can change the direction and pull you toward him.

=Fan Fiend Kai=

Fan Fiend Kai (マタサブロ 改 Matasaburo Kai) is the giant fan enemies in Cloud Man's stage and in the first Wily stage. Unlike its predecessor in Mega Man 2, it can change direction of its fan. Sometimes it'd be pushing Mega Man away, other times it may be pulling him toward it--perhaps either to do bodily contact damage or pull him into a pit!

Trivia

 * "Kai" is Japanese for "improved".
 * The Top Fiend is very similar to it.