diff --git a/Content.Client/Humanoid/HumanoidSystem.cs b/Content.Client/Humanoid/HumanoidSystem.cs
index 7051b8711f..125a332dee 100644
--- a/Content.Client/Humanoid/HumanoidSystem.cs
+++ b/Content.Client/Humanoid/HumanoidSystem.cs
@@ -57,6 +57,7 @@ public sealed class HumanoidSystem : SharedHumanoidSystem
             profile.Species,
             customBaseLayers,
             profile.Appearance.SkinColor,
+            profile.Sex,
             new(), // doesn't exist yet
             markings.GetForwardEnumerator().ToList());
     }
diff --git a/Content.Client/Humanoid/HumanoidVisualizerSystem.cs b/Content.Client/Humanoid/HumanoidVisualizerSystem.cs
index 8c50e543bf..808a5a1ba7 100644
--- a/Content.Client/Humanoid/HumanoidVisualizerSystem.cs
+++ b/Content.Client/Humanoid/HumanoidVisualizerSystem.cs
@@ -36,7 +36,9 @@ public sealed class HumanoidVisualizerSystem : VisualizerSystem<HumanoidComponen
             return;
         }
 
-        bool dirty = data.SkinColor != component.SkinColor;
+        var dirty = data.SkinColor != component.SkinColor || data.Sex != component.Sex;
+        component.Sex = data.Sex;
+
         if (data.CustomBaseLayerInfo.Count != 0)
         {
             dirty |= MergeCustomBaseSprites(uid, baseSprites.Sprites, data.CustomBaseLayerInfo, component);
@@ -442,6 +444,4 @@ public sealed class HumanoidVisualizerSystem : VisualizerSystem<HumanoidComponen
             }
         }
     }
-
-
 }
diff --git a/Content.Client/Humanoid/MarkingPicker.xaml.cs b/Content.Client/Humanoid/MarkingPicker.xaml.cs
index 5d9178ba6a..2e53365ce0 100644
--- a/Content.Client/Humanoid/MarkingPicker.xaml.cs
+++ b/Content.Client/Humanoid/MarkingPicker.xaml.cs
@@ -179,8 +179,7 @@ public sealed partial class MarkingPicker : Control
 
         foreach (var marking in markings.Values)
         {
-            if (_currentMarkings.TryGetCategory(_selectedMarkingCategory, out var listing)
-                && listing.Contains(marking.AsMarking()))
+            if (_currentMarkings.TryGetMarking(_selectedMarkingCategory, marking.ID, out _))
             {
                 continue;
             }
diff --git a/Content.Server/Humanoid/Components/RandomHumanoidAppearanceComponent.cs b/Content.Server/Humanoid/Components/RandomHumanoidAppearanceComponent.cs
index 16c0ef2116..2d10a4ae14 100644
--- a/Content.Server/Humanoid/Components/RandomHumanoidAppearanceComponent.cs
+++ b/Content.Server/Humanoid/Components/RandomHumanoidAppearanceComponent.cs
@@ -7,7 +7,4 @@ namespace Content.Server.CharacterAppearance.Components;
 public sealed class RandomHumanoidAppearanceComponent : Component
 {
     [DataField("randomizeName")] public bool RandomizeName = true;
-
-    [DataField("ignoredSpecies", customTypeSerializer: typeof(PrototypeIdHashSetSerializer<SpeciesPrototype>))]
-    public readonly HashSet<string> IgnoredSpecies = new();
 }
diff --git a/Content.Server/Humanoid/Systems/HumanoidSystem.cs b/Content.Server/Humanoid/Systems/HumanoidSystem.cs
index 74ba3adc87..81146afc2a 100644
--- a/Content.Server/Humanoid/Systems/HumanoidSystem.cs
+++ b/Content.Server/Humanoid/Systems/HumanoidSystem.cs
@@ -39,6 +39,7 @@ public sealed partial class HumanoidSystem : SharedHumanoidSystem
             component.Species,
             component.CustomBaseLayers,
             component.SkinColor,
+            component.Sex,
             component.AllHiddenLayers.ToList(),
             component.CurrentMarkings.GetForwardEnumerator().ToList());
     }
@@ -50,19 +51,20 @@ public sealed partial class HumanoidSystem : SharedHumanoidSystem
             return;
         }
 
-        SetSpecies(uid, humanoid.Species, false, humanoid);
-
-        if (!string.IsNullOrEmpty(humanoid.Initial)
-            && _prototypeManager.TryIndex(humanoid.Initial, out HumanoidProfilePrototype? startingSet))
+        if (string.IsNullOrEmpty(humanoid.Initial)
+            || !_prototypeManager.TryIndex(humanoid.Initial, out HumanoidProfilePrototype? startingSet))
         {
-            // Do this first, because profiles currently do not support custom base layers
-            foreach (var (layer, info) in startingSet.CustomBaseLayers)
-            {
-                humanoid.CustomBaseLayers.Add(layer, info);
-            }
-
-            LoadProfile(uid, startingSet.Profile, humanoid);
+            LoadProfile(uid, HumanoidCharacterProfile.DefaultWithSpecies(humanoid.Species), humanoid);
+            return;
         }
+
+        // Do this first, because profiles currently do not support custom base layers
+        foreach (var (layer, info) in startingSet.CustomBaseLayers)
+        {
+            humanoid.CustomBaseLayers.Add(layer, info);
+        }
+
+        LoadProfile(uid, startingSet.Profile, humanoid);
     }
 
     private void OnExamined(EntityUid uid, HumanoidComponent component, ExaminedEvent args)
diff --git a/Content.Server/Humanoid/Systems/RandomHumanoidAppearanceSystem.cs b/Content.Server/Humanoid/Systems/RandomHumanoidAppearanceSystem.cs
index a05cd05227..fe183d6449 100644
--- a/Content.Server/Humanoid/Systems/RandomHumanoidAppearanceSystem.cs
+++ b/Content.Server/Humanoid/Systems/RandomHumanoidAppearanceSystem.cs
@@ -17,14 +17,14 @@ public sealed class RandomHumanoidAppearanceSystem : EntitySystem
     private void OnMapInit(EntityUid uid, RandomHumanoidAppearanceComponent component, MapInitEvent args)
     {
         // If we have an initial profile/base layer set, do not randomize this humanoid.
-        if (TryComp(uid, out HumanoidComponent? humanoid) && !string.IsNullOrEmpty(humanoid.Initial))
+        if (!TryComp(uid, out HumanoidComponent? humanoid) || !string.IsNullOrEmpty(humanoid.Initial))
         {
             return;
         }
 
-        var profile = HumanoidCharacterProfile.Random(component.IgnoredSpecies);
+        var profile = HumanoidCharacterProfile.RandomWithSpecies(humanoid.Species);
 
-        _humanoid.LoadProfile(uid, profile);
+        _humanoid.LoadProfile(uid, profile, humanoid);
 
         if (component.RandomizeName)
         {
diff --git a/Content.Shared/Humanoid/HumanoidCharacterAppearance.cs b/Content.Shared/Humanoid/HumanoidCharacterAppearance.cs
index 3709f72e58..6c03ec746c 100644
--- a/Content.Shared/Humanoid/HumanoidCharacterAppearance.cs
+++ b/Content.Shared/Humanoid/HumanoidCharacterAppearance.cs
@@ -97,6 +97,28 @@ namespace Content.Shared.Humanoid
             );
         }
 
+        public static HumanoidCharacterAppearance DefaultWithSpecies(string species)
+        {
+            var speciesPrototype = IoCManager.Resolve<IPrototypeManager>().Index<SpeciesPrototype>(species);
+            var skinColor = speciesPrototype.SkinColoration switch
+            {
+                HumanoidSkinColor.HumanToned => Humanoid.SkinColor.HumanSkinTone(speciesPrototype.DefaultHumanSkinTone),
+                HumanoidSkinColor.Hues => speciesPrototype.DefaultSkinTone,
+                HumanoidSkinColor.TintedHues => Humanoid.SkinColor.TintedHues(speciesPrototype.DefaultSkinTone),
+                _ => Humanoid.SkinColor.ValidHumanSkinTone
+            };
+
+            return new(
+                HairStyles.DefaultHairStyle,
+                Color.Black,
+                HairStyles.DefaultFacialHairStyle,
+                Color.Black,
+                Color.Black,
+                skinColor,
+                new ()
+            );
+        }
+
         private static IReadOnlyList<Color> RealisticEyeColors = new List<Color>
         {
             Color.Brown,
diff --git a/Content.Shared/Humanoid/HumanoidVisualizerKeys.cs b/Content.Shared/Humanoid/HumanoidVisualizerKeys.cs
index 1124d80bf2..ecfd5d479c 100644
--- a/Content.Shared/Humanoid/HumanoidVisualizerKeys.cs
+++ b/Content.Shared/Humanoid/HumanoidVisualizerKeys.cs
@@ -12,11 +12,12 @@ public enum HumanoidVisualizerKey
 [Serializable, NetSerializable]
 public sealed class HumanoidVisualizerData : ICloneable
 {
-    public HumanoidVisualizerData(string species, Dictionary<HumanoidVisualLayers, CustomBaseLayerInfo> customBaseLayerInfo, Color skinColor, List<HumanoidVisualLayers> layerVisibility, List<Marking> markings)
+    public HumanoidVisualizerData(string species, Dictionary<HumanoidVisualLayers, CustomBaseLayerInfo> customBaseLayerInfo, Color skinColor, Sex sex, List<HumanoidVisualLayers> layerVisibility, List<Marking> markings)
     {
         Species = species;
         CustomBaseLayerInfo = customBaseLayerInfo;
         SkinColor = skinColor;
+        Sex = sex;
         LayerVisibility = layerVisibility;
         Markings = markings;
     }
@@ -24,11 +25,12 @@ public sealed class HumanoidVisualizerData : ICloneable
     public string Species { get; }
     public Dictionary<HumanoidVisualLayers, CustomBaseLayerInfo> CustomBaseLayerInfo { get; }
     public Color SkinColor { get; }
+    public Sex Sex { get; }
     public List<HumanoidVisualLayers> LayerVisibility { get; }
     public List<Marking> Markings { get; }
 
     public object Clone()
     {
-        return new HumanoidVisualizerData(Species, new(CustomBaseLayerInfo), SkinColor, new(LayerVisibility), new(Markings));
+        return new HumanoidVisualizerData(Species, new(CustomBaseLayerInfo), SkinColor, Sex, new(LayerVisibility), new(Markings));
     }
 }
diff --git a/Content.Shared/Humanoid/Prototypes/SpeciesPrototype.cs b/Content.Shared/Humanoid/Prototypes/SpeciesPrototype.cs
index d5636ac48b..cf1f3ebb3f 100644
--- a/Content.Shared/Humanoid/Prototypes/SpeciesPrototype.cs
+++ b/Content.Shared/Humanoid/Prototypes/SpeciesPrototype.cs
@@ -44,6 +44,19 @@ public sealed class SpeciesPrototype : IPrototype
     [DataField("sprites")]
     public string SpriteSet { get; } = default!;
 
+    /// <summary>
+    ///     Default skin tone for this species. This applies for non-human skin tones.
+    /// </summary>
+    [DataField("defaultSkinTone")]
+    public Color DefaultSkinTone { get; } = Color.White;
+
+    /// <summary>
+    ///     Default human skin tone for this species. This applies for human skin tones.
+    ///     See <see cref="SkinColor.HumanSkinTone"/> for the valid range of skin tones.
+    /// </summary>
+    [DataField("defaultHumanSkinTone")]
+    public int DefaultHumanSkinTone { get; } = 20;
+
     /// <summary>
     ///     The limit of body markings that you can place on this species.
     /// </summary>
diff --git a/Content.Shared/Humanoid/SharedHumanoidSystem.cs b/Content.Shared/Humanoid/SharedHumanoidSystem.cs
index 342f1d8ef3..423e3e117e 100644
--- a/Content.Shared/Humanoid/SharedHumanoidSystem.cs
+++ b/Content.Shared/Humanoid/SharedHumanoidSystem.cs
@@ -24,10 +24,11 @@ public abstract class SharedHumanoidSystem : EntitySystem
         string species,
         Dictionary<HumanoidVisualLayers, CustomBaseLayerInfo> customBaseLayer,
         Color skinColor,
+        Sex sex,
         List<HumanoidVisualLayers> visLayers,
         List<Marking> markings)
     {
-        var data = new HumanoidVisualizerData(species, customBaseLayer, skinColor, visLayers, markings);
+        var data = new HumanoidVisualizerData(species, customBaseLayer, skinColor, sex, visLayers, markings);
 
         // Locally raise an event for this, because there might be some systems interested
         // in this.
diff --git a/Content.Shared/Humanoid/SkinColor.cs b/Content.Shared/Humanoid/SkinColor.cs
index 75d24e9e92..c3c1fdb509 100644
--- a/Content.Shared/Humanoid/SkinColor.cs
+++ b/Content.Shared/Humanoid/SkinColor.cs
@@ -15,11 +15,10 @@ public static class SkinColor
     }
 
     /// <summary>
-    ///     Get a human skin tone based on a scale of 0 to 100.
+    ///     Get a human skin tone based on a scale of 0 to 100. The value is clamped between 0 and 100.
     /// </summary>
     /// <param name="tone">Skin tone. Valid range is 0 to 100, inclusive. 0 is gold/yellowish, 100 is dark brown.</param>
     /// <returns>A human skin tone.</returns>
-    /// <exception cref="ArgumentException">Exception if the value is under 0 or over 100.</exception>
     public static Color HumanSkinTone(int tone)
     {
         // 0 - 100, 0 being gold/yellowish and 100 being dark
@@ -31,10 +30,7 @@ public static class SkinColor
         // 20 is 25 - 20 - 100
         // 100 is 25 - 100 - 20
 
-        if (tone < 0 || tone > 100)
-        {
-            throw new ArgumentException("Skin tone value was under 0 or over 100.");
-        }
+        tone = Math.Clamp(tone, 0, 100);
 
         var rangeOffset = tone - 20;
 
diff --git a/Content.Shared/Preferences/HumanoidCharacterProfile.cs b/Content.Shared/Preferences/HumanoidCharacterProfile.cs
index b5fe13a943..14af731c6a 100644
--- a/Content.Shared/Preferences/HumanoidCharacterProfile.cs
+++ b/Content.Shared/Preferences/HumanoidCharacterProfile.cs
@@ -99,6 +99,11 @@ namespace Content.Shared.Preferences
         {
         }
 
+        /// <summary>
+        ///     Get the default humanoid character profile, using internal constant values.
+        ///     Defaults to <see cref="SharedHumanoidSystem.DefaultSpecies"/> for the species.
+        /// </summary>
+        /// <returns></returns>
         public static HumanoidCharacterProfile Default()
         {
             return new(
@@ -120,6 +125,33 @@ namespace Content.Shared.Preferences
                 new List<string>());
         }
 
+        /// <summary>
+        ///     Return a default character profile, based on species.
+        /// </summary>
+        /// <param name="species">The species to use in this default profile. The default species is <see cref="SharedHumanoidSystem.DefaultSpecies"/>.</param>
+        /// <returns>Humanoid character profile with default settings.</returns>
+        public static HumanoidCharacterProfile DefaultWithSpecies(string species = SharedHumanoidSystem.DefaultSpecies)
+        {
+            return new(
+                "John Doe",
+                "",
+                species,
+                MinimumAge,
+                Sex.Male,
+                Gender.Male,
+                HumanoidCharacterAppearance.DefaultWithSpecies(species),
+                ClothingPreference.Jumpsuit,
+                BackpackPreference.Backpack,
+                new Dictionary<string, JobPriority>
+                {
+                    {SharedGameTicker.FallbackOverflowJob, JobPriority.High}
+                },
+                PreferenceUnavailableMode.SpawnAsOverflow,
+                new List<string>(),
+                new List<string>());
+        }
+
+        // TODO: This should eventually not be a visual change only.
         public static HumanoidCharacterProfile Random(HashSet<string>? ignoredSpecies = null)
         {
             var prototypeManager = IoCManager.Resolve<IPrototypeManager>();
@@ -130,6 +162,15 @@ namespace Content.Shared.Preferences
                 .Where(x => ignoredSpecies == null ? x.RoundStart : x.RoundStart && !ignoredSpecies.Contains(x.ID))
                 .ToArray()
             ).ID;
+
+            return RandomWithSpecies(species);
+        }
+
+        public static HumanoidCharacterProfile RandomWithSpecies(string species = SharedHumanoidSystem.DefaultSpecies)
+        {
+            var prototypeManager = IoCManager.Resolve<IPrototypeManager>();
+            var random = IoCManager.Resolve<IRobustRandom>();
+
             var sex = random.Prob(0.5f) ? Sex.Male : Sex.Female;
             var gender = sex == Sex.Male ? Gender.Male : Gender.Female;
 
diff --git a/Resources/Prototypes/Species/reptilian.yml b/Resources/Prototypes/Species/reptilian.yml
index 879b72f25a..8186ce58c1 100644
--- a/Resources/Prototypes/Species/reptilian.yml
+++ b/Resources/Prototypes/Species/reptilian.yml
@@ -4,6 +4,7 @@
   roundStart: true
   prototype: MobReptilian
   sprites: MobReptilianSprites
+  defaultSkinTone: "#34a223"
   markingLimits: MobReptilianMarkingLimits
   dollPrototype: MobReptilianDummy
   skinColoration: Hues
diff --git a/Resources/Prototypes/Species/slime.yml b/Resources/Prototypes/Species/slime.yml
index 832f997d1c..5879ce6a64 100644
--- a/Resources/Prototypes/Species/slime.yml
+++ b/Resources/Prototypes/Species/slime.yml
@@ -4,6 +4,7 @@
   roundStart: true
   prototype: MobSlimePerson
   sprites: MobSlimeSprites
+  defaultSkinTone: "#b8b8b8"
   markingLimits: MobSlimeMarkingLimits
   dollPrototype: MobSlimePersonDummy
   skinColoration: Hues