[@Ithradine] If you want to do that, then I won't stop you; having multiple Affinities is possible, just very rare. That said, at worst he will be unable to use magic, and at best he'll be able to cast a single, incredibly weak spell, and then be completely out of mana for hours if not days. Due to the unique circumstances of the Return By Death group, it is possible to increase letter grading through training, but with such low stats, it'll be difficult to even find someone willing to train him, and in the scenario he does, the training required to improve such a weak Gate will inflict a heavy strain on both his body and soul.

Like I said above, you're free to go with that concept if you please, but there are and will be consequences in the grand scheme of the roleplay, in a similar way to those that can be incurred through starting with incredibly high stats.