diff --git a/lib/manabu/contact.rb b/lib/manabu/contact.rb
index f617824..cabbc3d 100644
--- a/lib/manabu/contact.rb
+++ b/lib/manabu/contact.rb
@@ -1,14 +1,15 @@
 require_relative './resource'
+require_relative './contact_type'
 
 module Manabu
   class Contact < Resource
-    attr_accessor :id, :data, :contact_type_id
+    attr_accessor :id, :data, :contact_type
 
     def fill(**info)
       @id = info.fetch(:id, @id)
       @data = info.fetch(:data, @data)
-      @contact_type_id = info.fetch(:contact_type_id, @contact_type_id)
-
+      @contact_type =
+        Manabu::ContactType.new(@client, info.fetch(:contact_type, {}))
       self
     end
 
diff --git a/lib/manabu/guardian.rb b/lib/manabu/guardian.rb
index a3112b4..9c73494 100644
--- a/lib/manabu/guardian.rb
+++ b/lib/manabu/guardian.rb
@@ -1,17 +1,16 @@
 require_relative './resource'
+require_relative './person'
 
 module Manabu
-  class Guardian < Resource
+  class Guardian < Person
+    PLURAL= 'guardians'.freeze
+    SINGULAR = 'guardian'.freeze
+
     class ContactNotAdded < StandardError; end
     class AddressNotAdded < StandardError; end
 
     attr_accessor :id, :surname, :name, :name_reading, :surname_reading, :birth_date, :gender
 
-    def initialize(client, **info)
-      super
-      @contacts = []
-    end
-
     def fill(**info)
       @id = info.fetch(:id, @id)
       @surname = info.fetch(:surname, @surname)
diff --git a/lib/manabu/person.rb b/lib/manabu/person.rb
new file mode 100644
index 0000000..368252a
--- /dev/null
+++ b/lib/manabu/person.rb
@@ -0,0 +1,75 @@
+module Manabu
+  class Person < Resource
+
+    def initialize(client, **info)
+      super
+      @addresses = nil
+      @contacts = nil
+      @picture = nil
+    end
+
+    def addresses
+      if @addresses.nil?
+        @addresses = _fetch_addresses
+      else
+        @addresses
+      end
+    end
+
+    def contacts
+      if @contacts.nil?
+        @contacts = _fetch_contacts
+      else
+        @contacts
+      end
+    end
+
+    def add_contact(contact)
+      contacts
+
+      response = @client.post("students/#{id}/contacts",
+                              contact_type_id: contact.contact_type.id,
+                              data: contact.data
+                             )
+      Contact.new(@client, response).tap do |new_contact|
+        contacts.push(new_contact)
+      end
+    rescue StandardError
+      raise ContactNotAdded, "Contact is not added to #{self.class::SINGULAR}"
+    end
+
+    def add_address(address)
+      response =
+        @client.post("students/#{id}/addresses",
+                     address1: address.address1,
+                     address2: address.address2,
+                     zipcode: address.zipcode,
+                     state: address.state,
+                     country_id: address.country_id,
+                     city: address.city
+                    )
+      Address.new(@client, response).tap do |new_address|
+        addresses.push(new_address)
+      end
+    rescue StandardError
+      raise AddressNotAdded, "Address is not added to #{self.class::SINGULAR}"
+    end
+
+    private
+
+    def _fetch_addresses
+      response = @client.get("#{self.class::PLURAL}/#{id}/addresses")
+      response[:addresses].map do |address|
+        Manabu::Address.new(@client, address)
+      end
+    end
+
+    def _fetch_contacts
+      response = @client.get("#{self.class::PLURAL}/#{id}/contacts")
+      response[:contacts].map do |contact|
+        Manabu::Contact.new(@client, contact)
+      end
+    end
+
+  end
+end
diff --git a/lib/manabu/student.rb b/lib/manabu/student.rb
index c1f21a9..a47d7ca 100644
--- a/lib/manabu/student.rb
+++ b/lib/manabu/student.rb
@@ -1,24 +1,22 @@
 require 'mimemagic'
 require_relative './resource'
+require_relative './person'
 require_relative './guardian'
 require_relative './enrollment_status'
 require_relative './contact'
 
 module Manabu
-  class Student < Resource
+  class Student < Person
+    PLURAL= 'students'.freeze
+    SINGULAR = 'student'.freeze
+
     class GuardianNotAdded < StandardError; end
     class ContactNotAdded < StandardError; end
     class AddressNotAdded < StandardError; end
     attr_accessor :id, :surname, :name, :name_reading,
                     :surname_reading, :middle_name,
                     :middle_name_reading,:birth_date, :gender, :enrollment_status,
-                    :contacts, :enrollment_status_code
-
-    def initialize(client, **info)
-      super
-      @contacts = []
-      @picture = nil
-    end
+                    :enrollment_status_code
 
     def fill(**info)
       @id = info.fetch(:id, @id)
@@ -63,31 +61,6 @@ def add_guardian(guardian)
       raise GuardianNotAdded, 'Guardian is not added to student'
     end
 
-    def add_contact(contact_type, data)
-      response = @client.post("students/#{id}/contacts",
-        contact_type_id: contact_type.id,
-        data: data
-      )
-      @contacts.push Contact.new(@client, response)
-      self
-    rescue StandardError
-      raise ContactNotAdded, 'Contact is not added to student'
-    end
-
-    def add_address(address)
-      response =
-        @client.post("students/#{id}/addresses",
-          address1: address.address1,
-          address2: address.address2,
-          zipcode: address.zipcode,
-          state: address.state,
-          country_id: address.country_id,
-          city: address.city
-        )
-      self
-    rescue StandardError
-      raise AddressNotAdded, 'Address is not added to student'
-    end
 
     def guardians
       response = @client.get("students/#{id}/guardians")