User blog comment:Roinelll/GEN - Cameos/@comment-25809774-20150727020831

Ken


 * Born in 2055


 * Become a God Eater at 2065 (10 years old)


 * The same time as Misaka


 * Lost Misaka at near the end of 2070


 * Unlock his Power of Blood at the same time


 * Created the Switch Blade after Lindow's "death"


 * Found Rui in the "leftovers"

There is one more but kinda spoils the story :/