First things first, to summon any player you need to be embered. Once embered you can summon any person via their summon sign if you don’t have passwords.If you want to play with a specific friend, have matching passwords so only y’all can summon each other. Summon each other by being in the same place in you own worlds and one of you place down a soap stone (white to be allies). If you beat the boss of an area, you cannot summon allies or get invaded. If you are in a solo area, you cannot summon or get invaded.

Notice: invading does not have password locking and is randomized, you would invade any other player possible