Remember when it was stated that Ashton was changing?
Well, him being a little bit vengeful was one of those said changes...
He's never been someone who does things like this. Not even in his previous life nor for the vast majority of his second life. This is a pretty recent thing and even Ashton himself wasn't aware that his behavior was changing in this way.
But, him being like this shouldn't be a bad thing. 'Shouldn't' is the key word here.
As long as he keeps it under control, he'd be fine. As long as he's targetting the right people, or in this case demons, then he will be fine.
This change was probably influenced by his isolation from society. It has almost been a year since he was rudely wrested away from civilization and hadn't a proper social interaction.
That does things to an individual's mentality, you know.
Recently, all he's aware of is the constant cycle of vexation and carnage.
