She is a foundling that was left in front of the Kamiyama household when she was still a baby.<br /> <br /> 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.<br /> <br /> The baby ages fast, reaching the age of a kindergartner in a single day.<br /> <br />