In Black Rock - chan , she serves as a guardian to both Black Rock - chan and Strength .
When she learns this was a lie , she breaks down and becomes a stagnated soul herself who is forced to be killed by Rock .
In Black Rock - chan , Rock serves as a guardian to both Black Rock - chan and Strength .
When she learns this was a lie , she breaks down and becomes a stagnated soul herself who is forced to be killed by Rock .