diff --git a/modular_skyrat/modules/modular_implants/code/nifs_tgui.dm b/modular_skyrat/modules/modular_implants/code/nifs_tgui.dm
index 6da74c6b89f..dfc9916ab83 100644
--- a/modular_skyrat/modules/modular_implants/code/nifs_tgui.dm
+++ b/modular_skyrat/modules/modular_implants/code/nifs_tgui.dm
@@ -121,6 +121,8 @@
 				return FALSE
 
 			current_theme = target_theme
+			for(var/datum/nifsoft/installed_nifsoft as anything in loaded_nifsofts)
+				installed_nifsoft.update_theme()
 
 		if("activate_nifsoft")
 			var/datum/nifsoft/activated_nifsoft = locate(params["activated_nifsoft"]) in loaded_nifsofts
diff --git a/modular_skyrat/modules/modular_implants/code/nifsofts.dm b/modular_skyrat/modules/modular_implants/code/nifsofts.dm
index 1bf551866f5..ddbff9cf86e 100644
--- a/modular_skyrat/modules/modular_implants/code/nifsofts.dm
+++ b/modular_skyrat/modules/modular_implants/code/nifsofts.dm
@@ -18,6 +18,8 @@
 	var/buying_category = NIFSOFT_CATEGORY_GENERAL
 	///What font awesome icon is shown next to the name of the nifsoft?
 	var/ui_icon = "floppy-disk"
+	///What UI theme do we want to display to users if this NIFSoft has TGUI?
+	var/ui_theme = "default"
 
 	///Can the program be installed with other instances of itself?
 	var/single_install = TRUE
@@ -67,6 +69,7 @@
 		qdel(src)
 
 	load_persistence_data()
+	update_theme()
 
 /datum/nifsoft/Destroy()
 	if(active)
@@ -148,6 +151,15 @@
 /datum/nifsoft/ui_state(mob/user)
 	return GLOB.conscious_state
 
+/// Updates the theme of the NIFSoft to match the parent NIF
+/datum/nifsoft/proc/update_theme()
+	var/obj/item/organ/internal/cyberimp/brain/nif/target_nif = parent_nif.resolve()
+	if(!target_nif)
+		return FALSE
+
+	ui_theme = target_nif.current_theme
+	return TRUE
+
 /// A disk that can upload NIFSofts to a recpient with a NIFSoft installed.
 /obj/item/disk/nifsoft_uploader
 	name = "Generic NIFSoft datadisk"
diff --git a/modular_skyrat/modules/modular_implants/code/nifsofts/soul_poem.dm b/modular_skyrat/modules/modular_implants/code/nifsofts/soul_poem.dm
index 4dc4434d59d..093e9e566b7 100644
--- a/modular_skyrat/modules/modular_implants/code/nifsofts/soul_poem.dm
+++ b/modular_skyrat/modules/modular_implants/code/nifsofts/soul_poem.dm
@@ -166,6 +166,7 @@
 	var/list/data = list()
 	data["messages"] = message_list
 
+	data["theme"] = ui_theme
 	data["receiving_data"] = receiving_data
 	data["transmitting_data"] = transmitting_data
 
diff --git a/modular_skyrat/modules/modular_implants/code/nifsofts/soulcatcher.dm b/modular_skyrat/modules/modular_implants/code/nifsofts/soulcatcher.dm
index 019ff546edc..2ec95a411ef 100644
--- a/modular_skyrat/modules/modular_implants/code/nifsofts/soulcatcher.dm
+++ b/modular_skyrat/modules/modular_implants/code/nifsofts/soulcatcher.dm
@@ -94,6 +94,17 @@
 	persistence.nif_soulcatcher_rooms = list2params(room_list)
 	return TRUE
 
+/datum/nifsoft/soulcatcher/update_theme()
+	. = ..()
+	if(!.)
+		return FALSE // uhoh
+
+	var/datum/component/soulcatcher/current_soulcatcher = linked_soulcatcher.resolve()
+	if(!istype(current_soulcatcher))
+		stack_trace("[src] ([REF(src)]) tried to update its theme when it was missing a linked_soulcatcher component!")
+		return FALSE
+	current_soulcatcher.ui_theme = ui_theme
+
 /datum/modular_persistence
 	///A param string containing soulcatcher rooms
 	var/nif_soulcatcher_rooms = ""
diff --git a/modular_skyrat/modules/modular_implants/code/soulcatcher/soulcatcher_component.dm b/modular_skyrat/modules/modular_implants/code/soulcatcher/soulcatcher_component.dm
index 03512b2c205..88cca7817a2 100644
--- a/modular_skyrat/modules/modular_implants/code/soulcatcher/soulcatcher_component.dm
+++ b/modular_skyrat/modules/modular_implants/code/soulcatcher/soulcatcher_component.dm
@@ -18,6 +18,8 @@ GLOBAL_LIST_EMPTY(soulcatchers)
 	var/list/soulcatcher_rooms = list()
 	/// What soulcatcher room are verbs sending messages to?
 	var/datum/soulcatcher_room/targeted_soulcatcher_room
+	/// What theme are we using for our soulcatcher UI?
+	var/ui_theme = "default"
 
 	/// Are ghosts currently able to join this soulcatcher?
 	var/ghost_joinable = TRUE
diff --git a/modular_skyrat/modules/modular_implants/code/soulcatcher/soulcatcher_tgui.dm b/modular_skyrat/modules/modular_implants/code/soulcatcher/soulcatcher_tgui.dm
index 0c1d11c272e..5dbd31631ec 100644
--- a/modular_skyrat/modules/modular_implants/code/soulcatcher/soulcatcher_tgui.dm
+++ b/modular_skyrat/modules/modular_implants/code/soulcatcher/soulcatcher_tgui.dm
@@ -13,6 +13,7 @@
 
 	data["ghost_joinable"] = ghost_joinable
 	data["require_approval"] = require_approval
+	data["theme"] = ui_theme
 	data["communicate_as_parent"] = communicate_as_parent
 	data["current_soul_count"] = length(get_current_souls())
 	data["max_souls"] = max_souls
diff --git a/tgui/packages/tgui/interfaces/NifSoulPoem.js b/tgui/packages/tgui/interfaces/NifSoulPoem.js
index f815f9287f8..9ced2081865 100644
--- a/tgui/packages/tgui/interfaces/NifSoulPoem.js
+++ b/tgui/packages/tgui/interfaces/NifSoulPoem.js
@@ -10,9 +10,10 @@ export const NifSoulPoem = (props, context) => {
     messages = [],
     receiving_data,
     transmitting_data,
+    theme,
   } = data;
   return (
-    <Window width={500} height={700}>
+    <Window width={500} height={700} theme={theme}>
       <Window.Content scrollable>
         <Section title="Messages">
           {messages.map((message) => (
diff --git a/tgui/packages/tgui/interfaces/Soulcatcher.js b/tgui/packages/tgui/interfaces/Soulcatcher.js
index f91f5fabef8..0c8c4f6e66b 100644
--- a/tgui/packages/tgui/interfaces/Soulcatcher.js
+++ b/tgui/packages/tgui/interfaces/Soulcatcher.js
@@ -12,10 +12,11 @@ export const Soulcatcher = (props, context) => {
     max_souls,
     removable,
     communicate_as_parent,
+    theme,
   } = data;
 
   return (
-    <Window width={520} height={400} resizable>
+    <Window width={520} height={400} theme={theme} resizable>
       <Window.Content scrollable>
         {current_rooms.map((room) => (
           <Section