Board Thread:Speculation House/@comment-71.84.15.225-20150807131522/@comment-4010415-20150817012857

68.13.203.44 wrote: Yang didn't say she was KIA all she said was, "One day she left for a mision and never came back." Thay doesnt mean she is dead. "left for a mission and never came back" is a dramatic and better-sounding way of saying "One day, she left for a mission and was killed."

Besides, we've seen her gravestone.

It says:

"Summer Rose

Thus Kindly I Scatter"

If you can't see it, there's also this image where I've made adjustments to make the gravestone easier to read.

Jeff Williams, who writes the songs for RWBY, said that Red Like Roses Part 2 is about Ruby and Summer. That song outright says "died" and the lyrics for Summer include "I made a sacrifice". Basically, Summer sacrificed herself for some cause while on her mission.