As a child Tsukiko was only acknowledged by Tobirama as Itama's playmate. However, after tbe death of Itama Tsukiko changes; she vows to become stronger and fight for the children who have lost their lives in war. After leaving on her own journey and returning to the village as a mature young Kunoichi, Tsukiko regains the attention of Tobirama, not as Itama's shy playmate, but as a woman who is able to hold her own ground.