diff --git a/Resources/Locale/en-US/_DV/reagents/meta/biological.ftl b/Resources/Locale/en-US/_DV/reagents/meta/biological.ftl
new file mode 100644
index 0000000000..d3fcceb245
--- /dev/null
+++ b/Resources/Locale/en-US/_DV/reagents/meta/biological.ftl
@@ -0,0 +1,2 @@
+reagent-name-sentient-grey-matter = sentient grey matter
+reagent-desc-sentient-grey-matter = Thought juice, the stuff that leaks out of your ears. It seems to be sparkling when you look at it in the right light. That's odd...
diff --git a/Resources/Migrations/deltaMigrations.yml b/Resources/Migrations/deltaMigrations.yml
index d0c682215f..8113abba17 100644
--- a/Resources/Migrations/deltaMigrations.yml
+++ b/Resources/Migrations/deltaMigrations.yml
@@ -131,3 +131,6 @@ AlwaysPoweredSmallLightMaintenanceRed: PoweredDimSmallLight
 
 # 2024-12-22
 VendingMachineRestockSalvageEquipment: null
+
+# 2025-01-11
+SpawnMobSmile: SentientSmileCore
diff --git a/Resources/Prototypes/Entities/Mobs/NPCs/pets.yml b/Resources/Prototypes/Entities/Mobs/NPCs/pets.yml
index 3570e8fd5e..41b1aca0ed 100644
--- a/Resources/Prototypes/Entities/Mobs/NPCs/pets.yml
+++ b/Resources/Prototypes/Entities/Mobs/NPCs/pets.yml
@@ -776,6 +776,9 @@
         BaseUnshaded: aslime-_3
       Dead:
         Base: rainbow_baby_slime_dead
+  - type: Body  # DeltaV - Changes to add brain
+    prototype: Smiles
+    requiredLegs: 1
   - type: Butcherable
     spawned:
     - id: FoodMeatSlime
diff --git a/Resources/Prototypes/_DV/Body/Organs/Animal/slimes.yml b/Resources/Prototypes/_DV/Body/Organs/Animal/slimes.yml
new file mode 100644
index 0000000000..b16f573547
--- /dev/null
+++ b/Resources/Prototypes/_DV/Body/Organs/Animal/slimes.yml
@@ -0,0 +1,17 @@
+- type: entity
+  id: SentientSmileCore
+  parent: SentientSlimesCore
+  name: sentient smile core
+  components:
+  - type: Sprite
+    sprite: _DV/Mobs/Pets/Smile/organs.rsi
+    state: brain-smile
+  - type: Extractable
+    grindableSolutionName: organ
+  - type: SolutionContainerManager
+    solutions:
+      organ:
+        maxVol: 5
+        reagents:
+        - ReagentId: SentientGreyMatter
+          Quantity: 5
diff --git a/Resources/Prototypes/_DV/Body/Prototypes/Animal/slimes.yml b/Resources/Prototypes/_DV/Body/Prototypes/Animal/slimes.yml
new file mode 100644
index 0000000000..80a27f8c3a
--- /dev/null
+++ b/Resources/Prototypes/_DV/Body/Prototypes/Animal/slimes.yml
@@ -0,0 +1,19 @@
+- type: body
+  id: Smiles
+  name: "Smiles"
+  parent: Slimes
+  root: torso
+  slots:
+    torso:
+      part: TorsoSlime
+      connections:
+      - legs
+      organs:
+        core: SentientSmileCore
+        lungs: OrganSlimesLungs
+    legs:
+      part: LegsAnimal
+      connections:
+      - feet
+    feet:
+      part: FeetAnimal
diff --git a/Resources/Prototypes/_DV/Reagents/biological.yml b/Resources/Prototypes/_DV/Reagents/biological.yml
new file mode 100644
index 0000000000..b45bf8a435
--- /dev/null
+++ b/Resources/Prototypes/_DV/Reagents/biological.yml
@@ -0,0 +1,5 @@
+- type: reagent
+  id: SentientGreyMatter
+  parent: GreyMatter
+  name: reagent-name-sentient-grey-matter
+  desc: reagent-desc-sentient-grey-matter
diff --git a/Resources/Prototypes/_DV/Recipes/Reactions/fun.yml b/Resources/Prototypes/_DV/Recipes/Reactions/fun.yml
index 2c026637ce..722c6a2a4f 100644
--- a/Resources/Prototypes/_DV/Recipes/Reactions/fun.yml
+++ b/Resources/Prototypes/_DV/Recipes/Reactions/fun.yml
@@ -9,3 +9,21 @@
   effects:
     - !type:CreateEntityReactionEffect
       entity: SheetGlass1
+
+- type: reaction
+  id: SmileTheSlime
+  impact: Low
+  quantized: true
+  conserveEnergy: false
+  reactants:
+    Happiness:
+      amount: 4
+    SentientGreyMatter:
+      amount: 5
+    JuiceThatMakesYouWeh:
+      amount: 10
+    Slime:
+      amount: 20
+  effects:
+  - !type:CreateEntityReactionEffect
+    entity: MobSlimesPet
diff --git a/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/brain-inhand-left.png b/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/brain-inhand-left.png
new file mode 100644
index 0000000000..c07475fc63
Binary files /dev/null and b/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/brain-inhand-left.png differ
diff --git a/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/brain-inhand-right.png b/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/brain-inhand-right.png
new file mode 100644
index 0000000000..c8c570917b
Binary files /dev/null and b/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/brain-inhand-right.png differ
diff --git a/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/brain-smile.png b/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/brain-smile.png
new file mode 100644
index 0000000000..60aaa2f92c
Binary files /dev/null and b/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/brain-smile.png differ
diff --git a/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/meta.json b/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/meta.json
new file mode 100644
index 0000000000..0452730816
--- /dev/null
+++ b/Resources/Textures/_DV/Mobs/Pets/Smile/organs.rsi/meta.json
@@ -0,0 +1,42 @@
+{
+    "version": 1,
+    "license": "CC-BY-SA-3.0",
+    "copyright": "Sprited by Nimfar11 (Github) for Space Station 14, inhands by mubururu_ (github)",
+    "size": {
+        "x": 32,
+        "y": 32
+    },
+    "states": [
+        {
+            "name": "brain-smile",
+            "delays": [
+                [
+                    10.0,
+                    0.2,
+                    0.4,
+                    0.2,
+                    0.1,
+                    0.1,
+                    0.1,
+                    0.1,
+                    0.2,
+                    0.4,
+                    0.6,
+                    0.4,
+                    5.0,
+                    0.02,
+                    0.02,
+                    0.02
+                ]
+            ]
+        },
+        {
+            "name": "brain-inhand-left",
+            "directions": 4
+        },
+        {
+                "name": "brain-inhand-right",
+                "directions": 4
+        }
+    ]
+}