I have a theory that Kira has always existed, by different names. Maybe Light wasn’t the first purity seeker. What if Kira is an immortal being bent on spreading chaos and disguising it as retribution. The crusades, aka a holy purge of those deemed unworthy? Kira. The holocaust, again, a purge of those deemed unworthy? Kira. Kira is the embodiment of false justice. Of those who try to use their power for what they believe is good, but ultimately bring about more chaos than good