NPCs

This page documents flags, functions and oddities related to NPCs in Dark Souls.

Big Hat Logan (Flags: 1090 - 1109)

Flag	State	Set when	Unset when
1090	Locked away in Sen's Fortress	Default.	-
1091	Rescued in Sen's Fortress	-	-
1092	In Firelink	-	-
1093	In Duke's Prison	-	-
1094	Rescued in Duke's Archives	-	-
1095	In Duke's Archives library	-	-
1096	Hostile	When HP is > 0% and <= 90% and damaged by the player anywhere.	-
1097	Dead	When HP is <= 0% anywhere.	Never.

721	All of his non-crystal spells bought	When the player buys all of his spells he can already sell in Firelink.	Never.
728	All of his normal and crystal spells bought	When the player buys all of this spells including the crystal variants available in Duke's Archives.	Never.

Flag	State	Set when	Unset when
1110	Locked away in Undead Burg	Default.	When 1111 or 1115 is set.
1111	Rescued from Burg	Open room door with 1110 set.	When 1112 or 1115 is set.
1112	In Firelink	Step on Firelink with 1111 set.	When 1113 or 1115 is set.
1113	In Firelink, selling more spells	Firelink loaded with 1112 and 11020694 (Logan left) set.	When 1117 or 1115 is set.
1114	Hostile (outside of Sen's Fortress)	When HP is > 0% and <= 90% and damaged by the player anywhere.	When 1115 is set or when Absolution is requested at Oswald.
1115	Dead	When HP <= 0% anywhere.	Never.
1117	Hollow in Sen's Fortress	Sen's loaded with 1114 not set + 1113 and 723 set.	When 1115 is set.

723	All of his spells and rings bought	When the player buys all of his spells including Soul Spear and Homing Soulmass and his two rings.	Never.

Location	When	When Not
Undead Burg	Default	If 1112 or 1113 set (func 50 in 10_1), or 1114 is set outside of Undead Burg (func 11010510).	6040
Firelink Shrine	If 1112 or 1113 set	Otherwise.	6041
Sen's Fortress	If 1117 set on Sen's load, or when 1114 not set + 1113 && 723 set.	Otherwise.	6043

Function	What it does
50 (common)	Initializes 1110 if no flag between 1110-1119 is set.
Undead Burg
50 (10_1)	Disables Griggs in Undead Burg if 1112 or 1113 is set.
11010510+1	Sets 1114 if <= 90% HP. Disables Griggs in Undead Burg if 1114 was not set by this function.
11010520+1	Sets 1115 if <= 0% HP. Spawns Griggs' drops in Undead Burg on reload if this function ran.
11010532	Disables 1110 and enables 1111 if the room door was unlocked and Griggs is not hostile.
Firelink Shrine
50 (10_2)	Disables Griggs in Firelink Shrine if 1112-1114 are not set.
11020510+1	Sets 1114 if <= 90% HP. Disables Griggs in Firelink Shrine if 1114 was not set by this function.
11020530+1	Sets 1115 if <= 0% HP or if Griggs goes down the NLR elevator. Spawns his drops in Firelink Shrine on reload if this function ran.
11020552	Sets 1112 and enables Griggs in Firelink if the player steps on Firelink ground with 1111 set and while Griggs is not hostile.
11020553	Sets 1113 if 1112 and 11020694 are set while Griggs is not hostile.
11020554	Set 1117 if the player steps on Sen's fortress ground while 1113 + 723 are set when Griggs is not hostile.
Sen's Fortress
50 (15_0)	Disables Griggs in Sen's Fortress if 1117 is not set.
11500520+1	Sets 1115 if <= 0% HP. Spawns Griggs' drops in Sen's Fortress on reload if this function ran.
11500533	Sets 1117 and enables Griggs in Sen's Fortress if Griggs is not hostile, 1113 and 723 are set and the player steps on Sen's Fortress ground.

Oddities:

Reappears in Undead Burg if in Sen's Fortress due to the Sen's flag (1117) not being checked.
Also reappears in Undead Burg if killed in Firelink/Sen's Fortress, because the dead flag (1115) is not checked, but also because func 11010520+1, which handles Griggs' death in Undead Burg, hasn't run and does not execute the command Force Character Treasure. This command would otherwise disable/kill Griggs and place his drops (if not yet collected) when Burg is loaded.
There is a useless function in the Firelink script (11020554) that would also set 1117 once the player steps on Sen's Fortress when Griggs is supposed to move there. But this can never happen while Firelink is loaded, thus it never runs.

If you finish his 2nd dialogue (where he introduces himself) before the gate (flag 11500591), then open the Sen's gate (11500200) and he is not hostile, flag 1491 will be set and he will move inside Sen's Fortress. Flag 1492 will be set if you did not finish his 2nd dialogue.
Once inside Sen's, he will move to Anor Londo (1493) if you at some point interacted with the boulder trap lever at least once (11500850). The direction does not matter in any way or what the boulder trap does by itself afterwards. If flag 1492 is set you also need to talk to him once (11500592).
When in Anor Londo (1493), killing the three Silver Knights in the room adjacent to Siegmeyer sets flag 1494. This alone is not enough to make him spawn in Firelink though, he needs to be talked to once and the dialogue finished for flag 11510590 to be set. In Firelink flags 1494 and 11510590 are checked to make him spawn there and set flag 1497. The Tiny Being's Ring is awarded by function 911+1 in common.emevd once 11510590 is set by Siegmeyer's ESD in Anor Londo.