Mattis was a resident of Westmarch at around 1270. He was amongst the people affected by the ravening haze that temporarily covered the Central Square, where he entered into a brawl with Luuko.[1]
In-game[]
Mattis is an NPC in Diablo Immortal, found in Westmarch. He is seen pacing back and forth, his route taking him through Scribe's Caravan and Rakkis Plaza. He is amongst the unnamed NPCs featured in the quest Ruined Expedition.