You can now choose to be exempt from the target of an Obsession

code/datums/brain_damage/creepy_trauma.dm

@@ -120,6 +120,7 @@
 /datum/brain_trauma/special/obsessed/proc/find_obsession()
 	var/list/viable_minds = list() //The first list, which excludes hijinks
 	var/list/possible_targets = list() //The second list, which filters out silicons and simplemobs
+	var/list/exemption_list = list() //A list of all targets, subtracting targets who are exempt from being an Obsession target through preferences. special_pool will still be picked first
 	var/static/list/trait_obsessions = list(
 		JOB_MIME = TRAIT_MIME_FAN,
 		JOB_CLOWN = TRAIT_CLOWN_ENJOYER,
@@ -148,12 +149,22 @@
 			if (trait_obsessions[job] != null && HAS_TRAIT(owner, trait_obsessions[job]))
 				special_pool += possible_target.current
 			possible_targets += possible_target.current
+			exemption_list += possible_target.current
+			//check if they are exempt from being an obsession target
+			var/mob/living/carbon/human/exempt_target = possible_target
+			if(exempt_target.obsession_target == 0)
+				exemption_list -= exempt_target
 
 	//Do we have any special target?
 	if(length(special_pool))
 		chosen_victim = pick(special_pool)
 		return chosen_victim
 
+	//Prioritize picking those who are eligible to roll being the target of an Obsession in preferences
+	if(length(exemption_list))
+		chosen_victim = pick(exemption_list)
+		return chosen_victim
+
 	//If not, pick any other ordinary target
 	if(possible_targets.len > 0)
 		chosen_victim = pick(possible_targets)

code/modules/client/preferences/obsession_target.dm

@@ -0,0 +1,7 @@
+/datum/preference/toggle/obsession_target
+	category = PREFERENCE_CATEGORY_NON_CONTEXTUAL
+	savefile_key = "obsession_target"
+	savefile_identifier = PREFERENCE_CHARACTER
+
+/datum/preference/toggle/obsession_target/apply_to_human(mob/living/carbon/human/target, value)
+	target.obsession_target = value

code/modules/mob/living/carbon/human/human_defines.dm

@@ -108,6 +108,9 @@
 	/// Normally set by `/datum/preference/toggle/persistent_scars/apply_to_human`.
 	var/persistent_scars
 
+	///Preferences check to determine if a character is capable or not of being the target of an Obsession.
+	var/obsession_target
+
 	/// Base height of the mob, modified by stuff like dwarfism or species
 	VAR_PRIVATE/base_mob_height = HUMAN_HEIGHT_MEDIUM
 	/// Actual height of the mob. Don't touch this one, it is set via update_mob_height()

tgstation.dme

@@ -3890,6 +3890,7 @@
 #include "code\modules\client\preferences\multiz_parallax.dm"
 #include "code\modules\client\preferences\multiz_performance.dm"
 #include "code\modules\client\preferences\names.dm"
+#include "code\modules\client\preferences\obsession_target.dm"
 #include "code\modules\client\preferences\ooc.dm"
 #include "code\modules\client\preferences\operative_species.dm"
 #include "code\modules\client\preferences\paint_color.dm"

tgui/packages/tgui/interfaces/PreferencesMenu/preferences/features/character_preferences/obsession.tsx

@@ -0,0 +1,8 @@
+import { CheckboxInput, type FeatureToggle } from '../base';
+
+export const obsession_target: FeatureToggle = {
+  name: 'Obsession Target',
+  description:
+    'If unchecked, you will be less likely to become a target for an Obsession.',
+  component: CheckboxInput,
+};