Operators are the characters used in battle by players in Arknights. Operators serve as "towers"; the player places Operators in locations around the battlefield to prevent enemies from reaching the objective.
Operators come in six rarities, denoted by a number of stars from 1 to 6.
Operators have many functionalities, ranging from directly fighting the enemy either with melee or long-ranged weaponry, using Originium Arts to attack the enemy with destructive magic, healing other Operators, or providing some form of offensive or defensive support.
There are two types of Operators: melee and ranged. Melee Operators are deployed on lower ground, or "melee tiles," while ranged Operators are deployed on higher ground, or "ranged tiles."
The majority of Operators are aligned with Rhodes Island, although some of them act as contacts or liaisons of their faction, mercenaries, or volunteers. This does not affect Operators' accessibility and usage during gameplay, however.
Operators are assigned into squads, with a player having four squads to assign their Operators into that can be renamed to their liking.
With an exception to Integrated Strategies, each squad is made up of 12 Operators. As each Operator is unique, only one of each Operator may be in a squad at a time.
Obtaining duplicates of Operators the player already own will give the respective Operator's Operator Token instead, which can be used to improve the Operator's potential and traded for Commendation Certificate or Distinction Certificate once the corresponding Operator's potential is maxed out.
There are also Operators given freely as a reward in various events, colloquially known as "welfare Operators."
Operators' attributes are displayed on the left side of the Character Details page, above the character name.
As the Operator gain levels, their attributes will be increased. The attribute cap will be increased when the Operator is promoted.
Increasing the Operator's potential and Trust will also provide a bonus to their attributes.