diff --git a/Content.Server/Standing/LayingDownSystem.cs b/Content.Server/Standing/LayingDownSystem.cs
index 69787ae830..73a929fdfc 100644
--- a/Content.Server/Standing/LayingDownSystem.cs
+++ b/Content.Server/Standing/LayingDownSystem.cs
@@ -48,7 +48,7 @@ public sealed class LayingDownSystem : EntitySystem
         if (TryComp<StandingStateComponent>(uid, out var standingState) && standingState.Standing)
             return;
 
-        args.ModifySpeed(component.DownedSpeedMultiplier, component.DownedSpeedMultiplier);
+        args.ModifySpeed(component.DownedSpeedMultiplier, component.DownedSpeedMultiplier, bypassImmunity: true);
     }
 
     private void OnParentChanged(EntityUid uid, LayingDownComponent component, EntParentChangedMessage args)
diff --git a/Content.Server/Traits/Assorted/TraitSpeedModifierSystem.cs b/Content.Server/Traits/Assorted/TraitSpeedModifierSystem.cs
deleted file mode 100644
index c804592347..0000000000
--- a/Content.Server/Traits/Assorted/TraitSpeedModifierSystem.cs
+++ /dev/null
@@ -1,19 +0,0 @@
-using Content.Shared.Movement.Systems;
-using Content.Server.Traits.Assorted;
-
-namespace Content.Shared.Traits.Assorted;
-
-public sealed class TraitSpeedModifierSystem : EntitySystem
-{
-    public override void Initialize()
-    {
-        base.Initialize();
-
-        SubscribeLocalEvent<TraitSpeedModifierComponent, RefreshMovementSpeedModifiersEvent>(OnRefreshMovementSpeed);
-    }
-
-    private void OnRefreshMovementSpeed(EntityUid uid, TraitSpeedModifierComponent component, RefreshMovementSpeedModifiersEvent args)
-    {
-        args.ModifySpeed(component.WalkModifier, component.SprintModifier);
-    }
-}
diff --git a/Content.Shared/Movement/Systems/MovementSpeedModifierSystem.cs b/Content.Shared/Movement/Systems/MovementSpeedModifierSystem.cs
index 7c793d5eb8..67a238cf60 100644
--- a/Content.Shared/Movement/Systems/MovementSpeedModifierSystem.cs
+++ b/Content.Shared/Movement/Systems/MovementSpeedModifierSystem.cs
@@ -1,5 +1,6 @@
 using Content.Shared.Inventory;
 using Content.Shared.Movement.Components;
+using Content.Shared.Traits.Assorted.Components;
 using Robust.Shared.Timing;
 
 namespace Content.Shared.Movement.Systems
@@ -16,7 +17,11 @@ namespace Content.Shared.Movement.Systems
             if (_timing.ApplyingState)
                 return;
 
-            var ev = new RefreshMovementSpeedModifiersEvent();
+            var isImmune = false;
+            if (HasComp<SpeedModifierImmunityComponent>(uid))
+                isImmune = true;
+
+            var ev = new RefreshMovementSpeedModifiersEvent(isImmune);
             RaiseLocalEvent(uid, ev);
 
             if (MathHelper.CloseTo(ev.WalkSpeedModifier, move.WalkSpeedModifier) &&
@@ -64,10 +69,24 @@ namespace Content.Shared.Movement.Systems
         public float WalkSpeedModifier { get; private set; } = 1.0f;
         public float SprintSpeedModifier { get; private set; } = 1.0f;
 
-        public void ModifySpeed(float walk, float sprint)
+        /// <summary>
+        ///    Whether this entity is immune to most movement speed modifiers.
+        ///    Bypassable by setting bypassImmunity to true.
+        /// </summary
+        private bool IsImmune = false;
+
+        public void ModifySpeed(float walk, float sprint, bool bypassImmunity = false)
         {
+            if (IsImmune && !bypassImmunity)
+                return;
+
             WalkSpeedModifier *= walk;
             SprintSpeedModifier *= sprint;
         }
+
+        public RefreshMovementSpeedModifiersEvent(bool isImmune = false)
+        {
+            IsImmune = isImmune;
+        }
     }
 }
diff --git a/Content.Shared/Traits/Assorted/Components/SpeedModifierImmunityComponent.cs b/Content.Shared/Traits/Assorted/Components/SpeedModifierImmunityComponent.cs
new file mode 100644
index 0000000000..e9bec98fd8
--- /dev/null
+++ b/Content.Shared/Traits/Assorted/Components/SpeedModifierImmunityComponent.cs
@@ -0,0 +1,12 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Traits.Assorted.Components;
+
+/// <summary>
+///   This is used to make an entity's movement speed constant and
+///   never affected by almost all movement speed modifiers.
+/// </summary>
+[RegisterComponent, NetworkedComponent]
+public sealed partial class SpeedModifierImmunityComponent : Component
+{
+}
diff --git a/Content.Server/Traits/Assorted/TraitSpeedModifierComponent.cs b/Content.Shared/Traits/Assorted/Components/TraitSpeedModifierComponent.cs
similarity index 52%
rename from Content.Server/Traits/Assorted/TraitSpeedModifierComponent.cs
rename to Content.Shared/Traits/Assorted/Components/TraitSpeedModifierComponent.cs
index 6acb32e6c1..85dc52a21f 100644
--- a/Content.Server/Traits/Assorted/TraitSpeedModifierComponent.cs
+++ b/Content.Shared/Traits/Assorted/Components/TraitSpeedModifierComponent.cs
@@ -1,14 +1,16 @@
-namespace Content.Server.Traits.Assorted;
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Traits.Assorted.Components;
 
 /// <summary>
 ///  This component is used for traits that modify movement speed.
 /// </summary>
-[RegisterComponent]
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
 public sealed partial class TraitSpeedModifierComponent : Component
 {
-    [DataField(required: true)]
+    [DataField, AutoNetworkedField]
     public float WalkModifier = 1.0f;
 
-    [DataField(required: true)]
+    [DataField, AutoNetworkedField]
     public float SprintModifier = 1.0f;
 }
diff --git a/Content.Shared/Traits/Assorted/Systems/TraitSpeedModifierSystem.cs b/Content.Shared/Traits/Assorted/Systems/TraitSpeedModifierSystem.cs
new file mode 100644
index 0000000000..9817ebc156
--- /dev/null
+++ b/Content.Shared/Traits/Assorted/Systems/TraitSpeedModifierSystem.cs
@@ -0,0 +1,31 @@
+using Content.Shared.Movement.Components;
+using Content.Shared.Movement.Systems;
+using Content.Shared.Traits.Assorted.Components;
+
+namespace Content.Shared.Traits.Assorted.Systems;
+
+public sealed class TraitSpeedModifierSystem : EntitySystem
+{
+    [Dependency] private readonly MovementSpeedModifierSystem _movement = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<TraitSpeedModifierComponent, ComponentStartup>(OnStartup);
+        SubscribeLocalEvent<TraitSpeedModifierComponent, RefreshMovementSpeedModifiersEvent>(OnRefreshMovementSpeed);
+    }
+
+    private void OnRefreshMovementSpeed(EntityUid uid, TraitSpeedModifierComponent component, RefreshMovementSpeedModifiersEvent args)
+    {
+        args.ModifySpeed(component.WalkModifier, component.SprintModifier, bypassImmunity: true);
+    }
+
+    private void OnStartup(EntityUid uid, TraitSpeedModifierComponent component, ComponentStartup args)
+    {
+        if (!TryComp<MovementSpeedModifierComponent>(uid, out var move))
+            return;
+
+        _movement.RefreshMovementSpeedModifiers(uid, move);
+    }
+}
diff --git a/Resources/Prototypes/Entities/Mobs/Species/diona.yml b/Resources/Prototypes/Entities/Mobs/Species/diona.yml
index e1628c620a..42383d9a42 100644
--- a/Resources/Prototypes/Entities/Mobs/Species/diona.yml
+++ b/Resources/Prototypes/Entities/Mobs/Species/diona.yml
@@ -109,6 +109,11 @@
     understands:
     - GalacticCommon
     - RootSpeak
+  - type: TraitSpeedModifier
+    sprintModifier: 0.75
+    walkModifier: 0.75
+  - type: SpeedModifierImmunity
+  - type: NoSlip
 
 - type: entity
   parent: BaseSpeciesDummy
diff --git a/Resources/Prototypes/Traits/disabilities.yml b/Resources/Prototypes/Traits/disabilities.yml
index 915ea0bf67..ca2453e41a 100644
--- a/Resources/Prototypes/Traits/disabilities.yml
+++ b/Resources/Prototypes/Traits/disabilities.yml
@@ -105,6 +105,10 @@
       traits:
         - ParkourTraining
         - SnailPaced
+    - !type:CharacterSpeciesRequirement
+      inverted: true
+      species:
+        - Diona
   components:
     - type: TraitSpeedModifier
       sprintModifier: 0.85
@@ -124,6 +128,10 @@
       traits:
         - ParkourTraining
         - Sluggish
+    - !type:CharacterSpeciesRequirement
+      inverted: true
+      species:
+        - Diona
   components:
     - type: TraitSpeedModifier
       sprintModifier: 0.7
diff --git a/Resources/Prototypes/Traits/skills.yml b/Resources/Prototypes/Traits/skills.yml
index 0da622da3c..56a8549c93 100644
--- a/Resources/Prototypes/Traits/skills.yml
+++ b/Resources/Prototypes/Traits/skills.yml
@@ -97,6 +97,10 @@
       traits:
         - Sluggish
         - SnailPaced
+    - !type:CharacterSpeciesRequirement
+      inverted: true
+      species:
+        - Diona
   components:
     - type: ClimbDelayModifier
       climbDelayMultiplier: 0.70