Ringo

A young girl who befriends Casshern, she manages to maintain her innocence despite growing up in a destroyed world. Despite witnessing Casshern mercilessly destroying a robot in order to save her, she continues to have faith in him. Being cared by Ohji, the two come across Casshern regularly, and witness his endeavors.

[Spoiler] Near the end of the anime, everyone except herself, Friender, and Casshern died. Ringo was devastated, but still grew up into a young woman, knowing and accepting death, waiting for Casshern's return. It is somehow hinted in her last encounter with Leda that she may have been the baby in Leda's womb. [/Spoiler]

(Source: Wikipedia)