@Jbcool
Get it over with. HIT ME! FIGHT ME! BLOOD, BLOOD FOR THE BLOOD GOD!
Okay then...
1) You don't need to
be of the Death Guard, only swear allegiance to them and Mortarion - due to them being the first
true Plague Marines. Likewise, if he were already part of another Chapter/Legion (I guess this from his history) then he'd not be a member of the Death Guard.
2) Thirty-five years old? So he's essentially a baby Astartes then? There is no way he'd be what he is and in the position he is in after only thiry-five years.
3) Former Guardsmen? The Astartes don't recruit from the Guard.
4) If you're trying to go for a 'not-fully-plagued' marine, then there's no way he'd look like that picture.
That's my quick and general summary thus far.
Oh...
5) He isn't a Plague Marine; Plague Marines are those who have been truly blessed by Papa Nurgle, are rotten as all Hell, and have sworn allegiance to Mortarion. He could well be a Marine devoted to Nurgle, seeking his favour and hoping to
become a Plague Marine, but until that point - a point from which he cannot return - he's just another Marine...albeit one who can withstand punishment/pain and smells a lot.