Go Online and Fight Revenants
Before you do anything else in Nioh, head over to the shrine and click the R3 button to establish an online connection. This will allow you to play online, and you’ll now be able to see the Revenants of other players. Revenants are essentially an AI-controlled version of a player character who has died in your area. You’ll see their grave sites every now and then, and you can stand near a grave site to view player details like their username, level, and more importantly, the rarity tiers of the gear they have on.
By summoning a Revenant from the grave site, you can defeat it for a chance to earn one of their gear pieces. If you see a Revenant with a purple katana, you’re going to want to try your luck for it. Do note that even if you do receive their purple gear, the bonuses and perks won’t necessarily be exactly the same as the player’s own. The bonuses seem to be completely random, so if you see a weapon or armor piece that you like, consider farming the Revenant until you get the drop with the rolls that suit your play style best.