Demontouched
Requires: Human or Orc ancestry.
Demons are entities of pure chaos, spawned with one overriding emotion that they cannot control. For some demons, this is lust; these demons are referred to as Succubi.
The offspring of a Succubus is a Cambion, but the Cambion are still human or orcish at their core, and can interbreed with them. The taint of demonic genetics passes down through their children, and while most appear completely untainted, the demonic blood can manifest in their descendants.
The Demontouched is a Human or Orc with just a touch of demonic energy, not enough to render them a Cambion, but enough to mark them in some minor way. This can take the form of albinism, red eyes, thick fingernails, natural baldness, or pointed ears. (More pointed, for an Orc.)
A Demontouched character suffers a -1 penalty to their Diplomacy skill, and a -2 penalty to attempts to Impersonate Another, but starts with one additional d8 Recovery die. If that character chooses the Scion background, they must choose to be a Demonic Scion.