Lulu

She is a foundling that was left in front of the Kamiyama household when she was still a baby. Initially Tenko thinks that it is her child that was brought by a stork after she was kissed by Samatarou. Therefore she decided to act as its mother with Samatarou acting like its father. The baby ages fast, reaching the age of a kindergartner in a single day. [spoiler]She was Ai's doll, but Ai lost her on an overpass. She turned into a human and came back to the world in order to meet Ai again.[/spoiler]