Pool for a category of alternate costume that depicts Arknights operators wearing typically-blue-black tactical clothes in-line with what appears to be standard for minor NPCs working for Rhodes Island. Named characters who canonically wear this type of costume, such as Ace and Scout, should probably not be included; this pool is intended to be about "realistic" re-imaginings of characters who don't canonically wear standardized gear.
Some more or related examples may be found with the following searches, respectively: alternate_costume rhodes_island_logo_(arknights) or tactical_clothes rhodes_island_logo_(arknights).