Since you're curious, I'll indulge you. I've exchanged some PMs with Saber where we discussed the concept of my character. It's most likely going to be a Mage Slayer who happened to be born close to the Dead Cairn. Being conceived in such an ill fated place has resulted in an ill fated future for this character, as they are afflicted with a condition called aberrant magic; in a nutshell, they possess a powerful boon or gift (the nature of which is still up for debate, but will inevitably be something of use to the Vigil) that is granted to them through the eldritch energies that course within the Cairn, but by the very nature of this terrifying artifact, these energies ask an even greater toll from this character. So in order not to be consumed by the curse and die, the character has to regularly end a human life, or become the sacrifice themselves. The character doesn't find this terribly amusing and would rather find a cure to this condition, but the Vigil on the other hand would prefer to keep this blessing within their grasp, so they always keep a watcher near the character to keep tabs on them (basically an NPC controlled by Saber). There, that's the rough idea. As you can tell, it's just a concept so far; I haven't even settled on a gender or anything.