The Mongolian is a mysterious entity that had appeared in various settings within the Witches and Translations universe.
In The Symphony of the Trees, which took place ten years before the main campaign, The Mongolian was witnessed being turned into a human puppet by The Old Man, who was then promptly slain by the party after begging for death. 10 years later in the Republic of Vollachia, it reappeared before the party among countless guards as they were arrested for suspicious activity after exiting the city sewers. However, the oddity of this could only be recognized by omniscient viewers.
The truth behind these bizarre events have yet to be answered. It is unknown whether this is mere coincidence, with it possibly being a lookalike of sorts. Regardless, the truth behind this entity is unknown, and needs to be investigated further.