Moichou

Just two centimetres long and able to communicate with its owner, we're presenting Hello Bird, your small, fingertip-size roommate! Hello Bird can expand, draw wool from its head, and write characters with its tail. Despite its fragile appearance, the small animal is filled with interesting traits.

(Source: Densho Bato, translated)

Note: Won the grand prize at the E-Chara Book Awards 2005.