Board Thread:Speculation House/@comment-203.14.52.141-20151216011808/@comment-26397825-20160123215321

Judging by the ages and how we have been told Cinder is not much older than the girls, Cinder would have been around 10 when Summer died. That's too young for Summer to have mentored her, as Combat School doesn't start until 12 and Summer would have been busy with Yang, who was about 6 or 7 when Summer died, and Ruby, who was about 4 or 5 when Summer died.

The ages don't match up for any sort of Summer/Cinder mentoring to have happened.