Tanpopo-chan

Tanpopo-chan is a tiny character based on dandelions. She wears a pale dress. She flies along winds. Her name is Japanese for dandelion.
Tanpopo-chan first appeared in April 7, 2000, in the episode Anpanman and Tanpopo-chan. She also appeared in several episodes afterwards.

(Source: Anpanman Wikia)