I think Rasputin is in Seraphim Vault. There was one warmind per planet, and Rasputin is the last known warmind AI alive. Serpahim [in their biblical origin] are essentially protectors of God (they keep people from being blinded by his holiness yadayadayads). I think the "God" is either Rasputin or the Traveler. Either way, the Seven Seraphs are probably protectors, and Rasputin is being hid by them/its/those things/ect