In the Cosmere, every human has a corresponding soul in the Spiritual Realms, composed of pure Investiture. Following the Shattering of Adonalsium, all Investiture was distributed among the 16 Shards. When a person is born in the Cosmere, particularly on a non-Shardic world, I question whose Investiture is used to form their soul. In fact, I doubt that even on planets with a resident Shard, their Investiture is utilized. According to Icy Tongue (Ghostbloods), the storm light can be blanked of identity . So I propose that when a person is born in cosmere investiture without identity is used to form their soul. What are your thoughts on this?"