Eerie adjective – Fearfully and mysteriously strange or fantastic. Sinister is a synonym for eerie in uncanny topic. In some cases you can use "Sinister" instead an adjective "Eerie", when it comes to topics like grim, macabre. Nearby Word: eerily
To tell them apart, check out if the character is portrayed as evil or eerie/sinister - or at least it is shown that those aspects of the job have an adverse and/or dehumanizing impact on their psyche.
Surprizingly for a Touhou game, this one has an eerie and sinister atmosphere fitting for the apocalyptic events taking place and perfectly depicts the darker side of Gensokyo which is so rarely explored in most games.