In the Androids Arc of the series, Android 18, a powerful android created by Dr. Gero, makes a wish to Shenron, the Eternal Dragon, to have a child with her husband, Krillin. However, Shenron informs her that the wish will only be granted if it is made with a pure heart and without any malicious intentions. Android 18, with her pure heart and genuine desire to have a child, makes the wish, which Shenron grants.