diff --git a/module/applications/dialogs/d20RollDialog.mjs b/module/applications/dialogs/d20RollDialog.mjs
index 64fa168a..d8317d70 100644
--- a/module/applications/dialogs/d20RollDialog.mjs
+++ b/module/applications/dialogs/d20RollDialog.mjs
@@ -123,6 +123,10 @@ export default class D20RollDialog extends HandlebarsApplicationMixin(Applicatio
             context.advantage = this.config.roll?.advantage;
             context.disadvantage = this.config.roll?.disadvantage;
             context.diceOptions = CONFIG.DH.GENERAL.diceTypes;
+            context.diceFaces = CONFIG.DH.GENERAL.dieFaces.reduce((acc, face) => {
+                acc[face] = `d${face}`;
+                return acc;
+            }, {});
             context.isLite = this.config.roll?.lite;
             context.extraFormula = this.config.extraFormula;
             context.formula = this.roll.constructFormula(this.config);
@@ -152,9 +156,7 @@ export default class D20RollDialog extends HandlebarsApplicationMixin(Applicatio
         }
         if (this.config.uses) this.config.uses = foundry.utils.mergeObject(this.config.uses, rest.uses);
         if (rest.roll?.dice) {
-            Object.entries(rest.roll.dice).forEach(([key, value]) => {
-                this.roll[key] = value;
-            });
+            this.roll = foundry.utils.mergeObject(this.roll, rest.roll.dice);
         }
         if (rest.hasOwnProperty('trait')) {
             this.config.roll.trait = rest.trait;
@@ -173,6 +175,15 @@ export default class D20RollDialog extends HandlebarsApplicationMixin(Applicatio
         this.disadvantage = advantage === -1;
 
         this.config.roll.advantage = this.config.roll.advantage === advantage ? 0 : advantage;
+
+        if (this.config.roll.advantage === 1 && this.config.data.rules.roll.defaultAdvantageDice) {
+            const faces = Number.parseInt(this.config.data.rules.roll.defaultAdvantageDice);
+            this.roll.advantageFaces = Number.isNaN(faces) ? this.roll.advantageFaces : faces;
+        } else if (this.config.roll.advantage === -1 && this.config.data.rules.roll.defaultDisadvantageDice) {
+            const faces = Number.parseInt(this.config.data.rules.roll.defaultDisadvantageDice);
+            this.roll.advantageFaces = Number.isNaN(faces) ? this.roll.advantageFaces : faces;
+        }
+
         this.render();
     }
 
diff --git a/module/data/actor/character.mjs b/module/data/actor/character.mjs
index 13a47b45..e6bcd294 100644
--- a/module/data/actor/character.mjs
+++ b/module/data/actor/character.mjs
@@ -285,7 +285,23 @@ export default class DhCharacter extends DhCreature {
                     guaranteedCritical: new fields.BooleanField({
                         label: 'DAGGERHEART.ACTORS.Character.roll.guaranteedCritical.label',
                         hint: 'DAGGERHEART.ACTORS.Character.roll.guaranteedCritical.hint'
-                    })
+                    }),
+                    defaultAdvantageDice: new fields.NumberField({
+                        nullable: true,
+                        required: true,
+                        integer: true,
+                        choices: CONFIG.DH.GENERAL.dieFaces,
+                        initial: null,
+                        label: 'DAGGERHEART.ACTORS.Character.defaultAdvantageDice'
+                    }),
+                    defaultDisadvantageDice: new fields.NumberField({
+                        nullable: true,
+                        required: true,
+                        integer: true,
+                        choices: CONFIG.DH.GENERAL.dieFaces,
+                        initial: null,
+                        label: 'DAGGERHEART.ACTORS.Character.defaultDisadvantageDice'
+                    }),
                 })
             })
         };
diff --git a/module/data/actor/companion.mjs b/module/data/actor/companion.mjs
index 9a21ba23..a1fa1429 100644
--- a/module/data/actor/companion.mjs
+++ b/module/data/actor/companion.mjs
@@ -61,6 +61,24 @@ export default class DhCompanion extends DhCreature {
                         initial: false,
                         label: 'DAGGERHEART.GENERAL.Rules.conditionImmunities.vulnerable'
                     })
+                }),
+                roll: new fields.SchemaField({
+                    defaultAdvantageDice: new fields.NumberField({
+                        nullable: true,
+                        required: true,
+                        integer: true,
+                        choices: CONFIG.DH.GENERAL.dieFaces,
+                        initial: null,
+                        label: 'DAGGERHEART.ACTORS.Character.defaultAdvantageDice'
+                    }),
+                    defaultDisadvantageDice: new fields.NumberField({
+                        nullable: true,
+                        required: true,
+                        integer: true,
+                        choices: CONFIG.DH.GENERAL.dieFaces,
+                        initial: null,
+                        label: 'DAGGERHEART.ACTORS.Character.defaultDisadvantageDice'
+                    }),
                 })
             }),
             attack: new ActionField({
diff --git a/module/dice/dualityRoll.mjs b/module/dice/dualityRoll.mjs
index f9a06d37..2448a16d 100644
--- a/module/dice/dualityRoll.mjs
+++ b/module/dice/dualityRoll.mjs
@@ -3,7 +3,6 @@ import D20Roll from './d20Roll.mjs';
 import { parseRallyDice, setDiceSoNiceForDualityRoll } from '../helpers/utils.mjs';
 
 export default class DualityRoll extends D20Roll {
-    _advantageFaces = 6;
     _advantageNumber = 1;
     _rallyIndex;
 
@@ -11,6 +10,9 @@ export default class DualityRoll extends D20Roll {
         super(formula, data, options);
         this.rallyChoices = this.setRallyChoices();
         this.guaranteedCritical = options.guaranteedCritical;
+
+        const advantageFaces = data.rules?.roll?.defaultAdvantageDice ? Number.parseInt(data.rules.roll.defaultAdvantageDice) : 6
+        this.advantageFaces = Number.isNaN(advantageFaces) ? 6 : advantageFaces;
     }
 
     static messageType = 'dualityRoll';
@@ -51,14 +53,6 @@ export default class DualityRoll extends D20Roll {
         return this.dice[2] instanceof game.system.api.dice.diceTypes.DisadvantageDie ? this.dice[2] : null;
     }
 
-    get advantageFaces() {
-        return this._advantageFaces;
-    }
-
-    set advantageFaces(faces) {
-        this._advantageFaces = this.getFaces(faces);
-    }
-
     get advantageNumber() {
         return this._advantageNumber;
     }
diff --git a/templates/dialogs/dice-roll/rollSelection.hbs b/templates/dialogs/dice-roll/rollSelection.hbs
index 2deccaf2..c30b0786 100644
--- a/templates/dialogs/dice-roll/rollSelection.hbs
+++ b/templates/dialogs/dice-roll/rollSelection.hbs
@@ -157,8 +157,8 @@
                                         <option value="{{add this 1}}" {{#if (eq @root.roll.advantageNumber (add this 1))}} selected{{/if}}>{{add this 1}}</option>
                                     {{/times}}
                                 </select>
-                                <select name="roll.dice.advantageFaces"{{#unless advantage}} disabled{{/unless}}>
-                                    {{selectOptions diceOptions selected=(concat 'd' @root.roll.advantageFaces)}}
+                                <select name="roll.dice.advantageFaces"{{#unless advantage}} disabled{{/unless}} data-dtype="Number">
+                                    {{selectOptions diceFaces selected=@root.roll.advantageFaces}}
                                 </select>
                             </div>
                             {{#if abilities}}