The ghost of Birch.
Birch was a Pagan that lived in the village of Beck o' the Wills. During The Metal Age, the Mechanists attacked the village and wiped out almost all inhabitants.[1] Birch died while trying to delay the Mechanists to allow his wife and daughter to escape via the Portal to The Maw of Chaos.[2]
When Garrett arrived at the village shortly after, he was able to witness the Ghost of Birch reliving his last moments of life.