Achiki Medusa

Achiki is Sorao's younger brother and the youngest of the Medusa family.His age,like Nobita,is also unknown.But he is younger than Akira and he can walk,so he is probably one and a half years old.Achiki is shy as ever,more than Akira,and would never even look at anyone except his family members.Achiki never appeared in the television cartoon like Akira.