diff --git a/code/modules/mob/living/carbon/human/species/_species.dm b/code/modules/mob/living/carbon/human/species/_species.dm
index bb3d2609010..67dd9b55312 100644
--- a/code/modules/mob/living/carbon/human/species/_species.dm
+++ b/code/modules/mob/living/carbon/human/species/_species.dm
@@ -84,6 +84,7 @@
 	var/single_gib_type = /obj/effect/decal/cleanable/blood/gibs
 	var/remains_type = /obj/effect/decal/remains/human //What sort of remains is left behind when the species dusts
 	var/base_color      //Used when setting species.
+	var/list/inherent_factions
 
 	//Used in icon caching.
 	var/race_key = 0
@@ -285,11 +286,19 @@
 		H.hud_used.update_locked_slots()
 	H.ventcrawler = ventcrawler
 
+	if(inherent_factions)
+		for(var/i in inherent_factions)
+			H.faction += i //Using +=/-= for this in case you also gain the faction from a different source.
+
 /datum/species/proc/on_species_loss(mob/living/carbon/human/H)
 	if(H.butcher_results) //clear it out so we don't butcher a actual human.
 		H.butcher_results = null
 	H.ventcrawler = initial(H.ventcrawler)
 
+	if(inherent_factions)
+		for(var/i in inherent_factions)
+			H.faction -= i
+
 /datum/species/proc/updatespeciescolor(mob/living/carbon/human/H) //Handles changing icobase for species that have multiple skin colors.
 	return
 
diff --git a/code/modules/mob/living/carbon/human/species/diona.dm b/code/modules/mob/living/carbon/human/species/diona.dm
index 22edf961270..a8639a1a948 100644
--- a/code/modules/mob/living/carbon/human/species/diona.dm
+++ b/code/modules/mob/living/carbon/human/species/diona.dm
@@ -108,13 +108,4 @@
 
 /datum/species/diona/pod //Same name and everything; we want the same limitations on them; we just want their regeneration to kick in at all times and them to have special factions
 	pod = TRUE
-
-/datum/species/diona/pod/on_species_gain(mob/living/carbon/C, datum/species/old_species)
-	. = ..()
-	C.faction |= "plants"
-	C.faction |= "vines"
-
-/datum/species/diona/pod/on_species_loss(mob/living/carbon/C)
-	. = ..()
-	C.faction -= "plants"
-	C.faction -= "vines"
+	inherent_factions = list("plants", "vines")
diff --git a/code/modules/mob/living/carbon/human/species/shadow.dm b/code/modules/mob/living/carbon/human/species/shadow.dm
index 7d1d4c26a61..63f062b8bc8 100644
--- a/code/modules/mob/living/carbon/human/species/shadow.dm
+++ b/code/modules/mob/living/carbon/human/species/shadow.dm
@@ -5,6 +5,7 @@
 	icobase = 'icons/mob/human_races/r_shadow.dmi'
 	deform = 'icons/mob/human_races/r_shadow.dmi'
 	dangerous_existence = TRUE
+	inherent_factions = list("faithless")
 
 	unarmed_type = /datum/unarmed_attack/claws
 
@@ -49,14 +50,12 @@
 	if(grant_vision_toggle)
 		vision_toggle = new
 		vision_toggle.Grant(H)
-	H.faction |= "faithless"
 
 /datum/species/shadow/on_species_loss(mob/living/carbon/human/H)
 	..()
 	if(grant_vision_toggle && vision_toggle)
 		H.vision_type = null
 		vision_toggle.Remove(H)
-	H.faction -= "faithless"
 
 /datum/species/shadow/handle_life(mob/living/carbon/human/H)
 	var/light_amount = 0
diff --git a/code/modules/mob/living/carbon/human/species/slime.dm b/code/modules/mob/living/carbon/human/species/slime.dm
index 3a3f4c3d3ac..0a708db223f 100644
--- a/code/modules/mob/living/carbon/human/species/slime.dm
+++ b/code/modules/mob/living/carbon/human/species/slime.dm
@@ -13,6 +13,7 @@
 	icobase = 'icons/mob/human_races/r_slime.dmi'
 	deform = 'icons/mob/human_races/r_slime.dmi'
 	remains_type = /obj/effect/decal/remains/slime
+	inherent_factions = list("slime")
 
 	// More sensitive to the cold
 	cold_level_1 = 280
diff --git a/code/modules/mob/living/simple_animal/slime/life.dm b/code/modules/mob/living/simple_animal/slime/life.dm
index d03e7ada419..4e1aee2c822 100644
--- a/code/modules/mob/living/simple_animal/slime/life.dm
+++ b/code/modules/mob/living/simple_animal/slime/life.dm
@@ -314,7 +314,7 @@
 
 				for(var/mob/living/L in view(7,src))
 
-					if(isslime(L) || L.stat == DEAD) // Ignore other slimes and dead mobs
+					if(L.stat == DEAD) // Ignore dead mobs
 						continue
 
 					if(L in Friends) // No eating friends!