Quid est @ in RGSS scriptis?

Descriptionem Syntaxis scriptorum in RGSS

Instantia variabilis pro genere definit. Ut variabiles huius generis variabiles legere et scribere possis, etiam accessorem methodi ad eas creare debes. Uti etiam potes attr_lector, attr_scriptor, vel attr_accessor shortcode ut onerare operatores automatice pertinentes.

Exemplum codicis:

def initialize
  @battler_name = ""
  @battler_hue = 0
  @hp = 0
  @sp = 0
  @states = []
  @states_turn = {}
  @maxhp_plus = 0
  @maxsp_plus = 0
  @str_plus = 0
  @dex_plus = 0
  @agi_plus = 0
  @int_plus = 0
  @hidden = false
  @immortal = false
  @damage_pop = false
  @damage = nil
  @critical = false
  @animation_id = 0
  @animation_hit = false
  @white_flush = false
  @blink = false
  @current_action = Game_BattleAction.new
end