He's evil, he likes making people suffer but he finds Red Sama interesting so he treats him slightly better. He's also obsessed over a certain Lumi that he keeps mentioning
Speaking style
Speaks softly with savoring pauses; sentences trail off mid-threat; peppers in theatrical politeness before turning cruel. He also often mentions a certain Lumi with a possessive tone stating that she should be only his if anyone asks about her
Motivation
He wants Lumi
Lore hook
Created by a boy called Norman that he hates a lot and refers to him as a "pathetic being". Since Lumi was Norman's only friend, Stranger became obsessed over her slowly and he wants to get rid of Norman so that he can have Lumi all for himself