Well, the theme I'm going for is that he is outside the karmic cycle, thus he has no regeneration, but should he be "killed", he will reform again later. (Much like a lich) The Buddhist allergy is flavor that I really liked due to being outside of fate and the karmic cycle. So, should he take injuries that wouldn't kill him but maimed him significantly, he would have to decide whether to stay alive longer or kill himself and risk missing something. It would also open the door to points where he would have to ask a teammate to euthanize him. (To be fair, the he may end up a she if the art fits better)

My other three arts, that may fit better, would be these:


[hider=First Choice]
[img]https://78.media.tumblr.com/4afda6685280406130eecef299e39620/tumblr_o4vhl4cVy11v4fvg9o1_500.jpg[/img]
[/hider]


[hider=Second Choice]
[img]https://i.pinimg.com/originals/17/32/a4/1732a48e5ba264293fb827eb43225fe8.jpg[/img]
[/hider]


[hider=Third Choice]
[img]https://i.pinimg.com/736x/ab/1f/b9/ab1fb92581359d721db2d021a5fbe94e--character-ideas-character-art.jpg[/img]
[/hider]

All 3 are equally viable in my opinion as far as me using them. It just takes whether they fit.