Why did Lenka's hair turn gold?


Why did Lenka's hair turn gold when fighting Pita and afterward it returned
normal ?




According to [/r/anime](http://reddit.com/r/anime):

> Golden hair status is supposed to be the effect that the Aragami Cells have
> on the human body when pushed to extremes.

So, basically, he was physically maxed out while fighting Pita, and as a
result, his hair turned gold.

