Unbreakable Patches is located behind the main doors to the cathedral in Cathedral of the Deep, disguised as Siegward of Catarina. To reach him you must make your way through the cathedral to the waterway with Giant Slaves, just outside the Deacons of the Deep boss arena, and then take the archway near the Cathedral Knights.
WARNING: This must be done before heading up the lift near the shortcut to the Cleansing Chapel.
After being betrayed in Cathedral of the Deep:
Head through the rafter towards Rosaria's Bed Chamber to find Patches. If you forgive him he'll give you the "Prostration" gesture and a Rusted Coin and become a merchant at this location. You can then purchase the Catarina armor from his inventory to continue Siegward of Catarina's quest line.
After purchasing the Tower Key:
Head up the tower behind Firelink Shrine to find the Fire Keeper Soul and then return down the lift to find Patches has locked you inside. Fall down the tower to exit the other side of the tower and then return to Firelink Shrine, near the Tower Key gate, to speak with Patches.
If you forgive him again he will become a permanent merchant at this location and will give you the "Patches Squat" gesture after reloading the area.
After sending Greirat to pillage Irithyll of the Boreal Valley:
Patches will ask where Greirat has gone and will no longer sell items. Inform him and he will disappear from Firelink Shrine until you defeat the next boss, as he has gone off to save Greirat from death.
Note: This event will not occur if you follow Siegward of Catarina's quest.
- 1,000 Souls
- Patches' Ashes
- Winged Spear, Pierce Shield, and Horsehoof Ring