WMG / Mori No Ando

Mr. Ando really is a penguin.
  • His human appearance is a reflection of the animals doubting his penguinity. He looks more human in his second appearance because by then they're convinced he really is a human. At the end, he leaves to protect the forest because he knows his fellow animals will never accept him.
http://tvtropes.org/pmwiki/pmwiki.php/WMG/MoriNoAndo