This will always return the Players Object associated with player me, in other words the player your script is bound to.
If your script is associated with a human player (eg. rules.js) remember that the human can use the Debug Menu to switch to another player, but the value of me will remain unchanged. If you want the player object of the player the human is currently controlling, use Players[selectedPlayer] instead (see example below).
Example
Get players object associated with my script
// players object associated with your script
var myObj = Players.me;
// players object for whichever player the local human is looking at
var localHumanObj = Players[selectedPlayer];
isSpectator() — A global function that performs a basic, un-cached check to determine if a player is a spectator based on presence of a Satellite Uplink at the start of the game.
Players[] — Main interface to Players API and an array of all players in the game, including Scavengers.
Players.alliesAndMe[] — Returns an array of players objects for living allied players, including me.
Players.alive[] — Returns an array of players objects for living players.
Players.allies[] — Returns an array of players objects for living allied players.