diff --git a/packages/pinia-orm/src/model/Model.ts b/packages/pinia-orm/src/model/Model.ts
index b17124e22..d7a45b67b 100644
--- a/packages/pinia-orm/src/model/Model.ts
+++ b/packages/pinia-orm/src/model/Model.ts
@@ -147,14 +147,14 @@ export class Model {
   protected static piniaExtend = {}
 
   /**
-   * The mutators for the model.
+   * The mutators for the model, keyed by entity.
    */
-  protected static fieldMutators: Mutators = {}
+  protected static fieldMutators: Record<string, Mutators> = {}
 
   /**
-   * The casts for the model.
+   * The casts for the model, keyed by entity.
    */
-  protected static fieldCasts: Record<string, any> = {}
+  protected static fieldCasts: Record<string, Casts> = {}
 
   /**
    * The array of booted models.
@@ -247,7 +247,8 @@ export class Model {
     key: string,
     mutator: MutatorFunctions<any>,
   ): M {
-    this.fieldMutators[key] = mutator
+    this.fieldMutators[this.modelEntity()] = this.fieldMutators[this.modelEntity()] ?? {}
+    this.fieldMutators[this.modelEntity()][key] = mutator
 
     return this
   }
@@ -260,7 +261,8 @@ export class Model {
     key: string,
     to: typeof CastAttribute,
   ): M {
-    this.fieldCasts[key] = to
+    this.fieldCasts[this.modelEntity()] = this.fieldCasts[this.modelEntity()] ?? {}
+    this.fieldCasts[this.modelEntity()][key] = to
 
     return this
   }
@@ -272,6 +274,7 @@ export class Model {
     this: M,
     key: keyof ModelFields,
   ): M {
+    if (!Object.prototype.hasOwnProperty.call(this, 'hidden')) { this.hidden = [...this.hidden] }
     this.hidden.push(key)
 
     return this
@@ -781,7 +784,7 @@ export class Model {
   $casts (): Casts {
     return {
       ...this.$getCasts(),
-      ...this.$self().fieldCasts,
+      ...this.$self().fieldCasts[this.$modelEntity()],
     }
   }
 
@@ -802,7 +805,7 @@ export class Model {
     const fillRelation = options.relations ?? true
     const mutators: Mutators = {
       ...this.$getMutators(),
-      ...this.$self().fieldMutators,
+      ...this.$self().fieldMutators[this.$modelEntity()],
     }
 
     for (const key in fields) {
diff --git a/packages/pinia-orm/tests/unit/model/Model_Casts_Custom.spec.ts b/packages/pinia-orm/tests/unit/model/Model_Casts_Custom.spec.ts
index 78fa246b5..d11363d59 100644
--- a/packages/pinia-orm/tests/unit/model/Model_Casts_Custom.spec.ts
+++ b/packages/pinia-orm/tests/unit/model/Model_Casts_Custom.spec.ts
@@ -72,6 +72,30 @@ describe('unit/model/Model_Casts_Custom', () => {
     expect(new User().name).toBe('string test')
   })
 
+  it('should keep decorator casts of same named fields separate between entities', () => {
+    class UpperCast extends CastAttribute {
+      get (value?: any): any {
+        return typeof value === 'string' ? value.toUpperCase() : value
+      }
+    }
+
+    class User extends Model {
+      static entity = 'users'
+
+      @Cast(() => UpperCast)
+      @Attr('') name!: string
+    }
+
+    class Group extends Model {
+      static entity = 'groups'
+
+      @Attr('') name!: string
+    }
+
+    expect(new User({ name: 'John' }, { operation: 'get' }).name).toBe('JOHN')
+    expect(new Group({ name: 'John' }, { operation: 'get' }).name).toBe('John')
+  })
+
   it('should cast with parameter', () => {
     class CustomCast extends CastAttribute {
       static parameters = {
diff --git a/packages/pinia-orm/tests/unit/model/Model_Hidden_Field.spec.ts b/packages/pinia-orm/tests/unit/model/Model_Hidden_Field.spec.ts
index 9748819ee..7a9e518df 100644
--- a/packages/pinia-orm/tests/unit/model/Model_Hidden_Field.spec.ts
+++ b/packages/pinia-orm/tests/unit/model/Model_Hidden_Field.spec.ts
@@ -36,6 +36,28 @@ describe('unit/model/Model_Hidden_Field', () => {
     expect(user.username).toBe(undefined)
   })
 
+  it('should only hide the field on the entity using the decorator', () => {
+    class User extends Model {
+      static entity = 'users'
+
+      @Str('') declare name: string
+      @Hidden() @Str('') declare username: string
+    }
+
+    class Account extends Model {
+      static entity = 'accounts'
+
+      @Str('') declare name: string
+      @Str('') declare username: string
+    }
+
+    const user = new User({ name: 'Test', username: 'John' }, { operation: 'get' })
+    const account = new Account({ name: 'Test', username: 'John' }, { operation: 'get' })
+
+    expect(user.username).toBe(undefined)
+    expect(account.username).toBe('John')
+  })
+
   it('should hide the field with "visible"', () => {
     class User extends Model {
       static entity = 'users'
diff --git a/packages/pinia-orm/tests/unit/model/Model_Mutators.spec.ts b/packages/pinia-orm/tests/unit/model/Model_Mutators.spec.ts
index 987a93f44..ebc15e743 100644
--- a/packages/pinia-orm/tests/unit/model/Model_Mutators.spec.ts
+++ b/packages/pinia-orm/tests/unit/model/Model_Mutators.spec.ts
@@ -39,6 +39,54 @@ describe('unit/model/Model_Mutators', () => {
     expect(new User({ name: 'john doe' }, { operation: 'get' }).name).toBe('JOHN DOE')
   })
 
+  it('should keep decorator mutators of same named fields separate between entities', () => {
+    class User extends Model {
+      static entity = 'users'
+
+      @Mutate((value: any) => value.toUpperCase())
+      @Attr('')
+      firstName!: string
+    }
+
+    class Contact extends Model {
+      static entity = 'contacts'
+
+      @Mutate((value: any) => value.toLowerCase())
+      @Attr('')
+      firstName!: string
+    }
+
+    expect(new User({ firstName: 'John' }, { operation: 'get' }).firstName).toBe('JOHN')
+    expect(new Contact({ firstName: 'John' }, { operation: 'get' }).firstName).toBe('john')
+  })
+
+  it('should only apply mutators added with "setMutator" to the model they were set on', () => {
+    class User extends Model {
+      static entity = 'users'
+
+      @Attr(0) id!: number
+      @Attr('') title!: string
+    }
+
+    class Todo extends Model {
+      static entity = 'todos'
+
+      @Attr(0) id!: number
+      @Attr('') title!: string
+    }
+
+    Todo.setMutator('title', { get: (value: any) => value.toUpperCase() })
+
+    const userRepo = useRepo(User)
+    const todoRepo = useRepo(Todo)
+
+    userRepo.save({ id: 1, title: 'user title' })
+    todoRepo.save({ id: 1, title: 'todo title' })
+
+    expect(todoRepo.find(1)?.title).toBe('TODO TITLE')
+    expect(userRepo.find(1)?.title).toBe('user title')
+  })
+
   it('should mutate data if mutators with getter are present', () => {
     class User extends Model {
       static entity = 'users'