The mysterious boy appears unexpectedly and prompts Karin to reach out to the outside world. A song the boy sings reminds Karin of someone she knows and it brings back warm memories.
The so called Digmas (little girl, soldier, & our protagonist), were they created by Atlas? If so, to what purpose? Also, what is Ryoko's deal, that she would have such influence over everything; how is she related to Karin & the Digmas?