diff --git a/src/main/java/cactusServer/entities/Character.java b/src/main/java/cactusServer/entities/Character.java
new file mode 100644
index 0000000..220ab11
--- /dev/null
+++ b/src/main/java/cactusServer/entities/Character.java
@@ -0,0 +1,63 @@
+package cactusServer.entities;
+
+import java.net.URI;
+
+import framework.model3D.Position3D;
+import framework.physics.AngularVelocity3D;
+import framework.physics.Velocity3D;
+
+public class Character {
+	private URI account_uri;
+	private String name;
+	private Position3D position;
+//	private Angle angle;
+//	private Camera camera_state;
+//	private Emote emote_state;
+//	private Model model;
+	private String area_id;
+	private boolean is_active;
+	
+	public Character(URI accountURI, String name, Position3D position, String areaId, boolean isActive) {
+		this.account_uri = accountURI;
+		this.name = name;
+		this.position = position;
+		this.area_id = areaId;
+		this.is_active = isActive;
+	}
+	
+	public URI getAccountURI() {
+		return account_uri;
+	}
+
+	public void setAccountURI(URI accountURI) {
+		this.account_uri = accountURI;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public Position3D getPosition() {
+		return position;
+	}
+
+	public void setPosition(Position3D position) {
+		this.position = position;
+	}
+
+	public boolean isAactive() {
+		return is_active;
+	}
+
+	public void setActive(boolean isActive) {
+		this.is_active = isActive;
+	}
+
+	public String getAreaId() {
+		return area_id;
+	}	
+}
diff --git a/src/main/java/cactusServer/entities/Instance.java b/src/main/java/cactusServer/entities/Instance.java
index 1301487..7f6f566 100644
--- a/src/main/java/cactusServer/entities/Instance.java
+++ b/src/main/java/cactusServer/entities/Instance.java
@@ -1,13 +1,19 @@
 package cactusServer.entities;
 
+import java.net.URI;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Random;
+import java.util.Set;
+import java.util.UUID;
 
 import cactusServer.entities.Area.Allowed;
 import cactusServer.entities.Object;
+import cactusServer.entities.Character;
 import framework.model3D.Position3D;
 import framework.physics.AngularVelocity3D;
 import framework.physics.Velocity3D;
+import net.arnx.jsonic.JSONHint;
 
 /**
  * �C���X�^���X
@@ -17,8 +23,11 @@
 public class Instance {
 	private String name;
 	private State state;
-	private HashMap<String, Area> areaMap = new HashMap<>();
-	private HashMap<String, Object> objMap = new HashMap<>();
+//	private StageModel stage;
+	@JSONHint(ignore = true) private HashMap<String, Area> areaMap = new HashMap<>();
+	@JSONHint(ignore = true) private HashMap<String, Object> objMap = new HashMap<>();
+	@JSONHint(ignore = true) private HashMap<String, Character> characterMap = new HashMap<>();
+	@JSONHint(ignore = true) private static final int UNIQUE_ID_LENGTH = 12;
 	
 	/**
 	 * (�����͌����_�ł̉��̂���)
@@ -37,6 +46,10 @@
 		return state;
 	}
 	
+	public Set<String> getAreaIdSet() {
+		return areaMap.keySet();
+	}
+	
 	public HashMap<String, Area> getAreaMap() {
 		return areaMap;
 	}
@@ -45,6 +58,10 @@
 		return areaMap.get(areaId);
 	}
 	
+	public Set<String> getObjIdSet() {
+		return objMap.keySet();
+	}
+	
 	public HashMap<String, Object> getObjMap() {
 		return objMap;
 	}
@@ -53,36 +70,75 @@
 		return objMap.get(objId);
 	}
 	
+	public Set<String> getCharacterIdSet() {
+		return characterMap.keySet();
+	}
+	
+	public HashMap<String, Character> getCharacterMap() {
+		return characterMap;
+	}
+	
+	public Character getCharacter(String characterId) {
+		return characterMap.get(characterId);
+	}
+	
 	public void setState(State state) {
 		this.state = state;
 	}
-	
+
 	public Area createArea(String areaId, String name, Plain[] regions, HashSet<Allowed> permissions) {
-		if (areaMap.containsKey(areaId)) {
-			return null;
-		}
+		String id = createUniqueId(UNIQUE_ID_LENGTH, areaMap.keySet());
 		Area area = new Area(name, regions, permissions);
-		areaMap.put(areaId, area);
+		areaMap.put(id, area);
 		return area;
 	}
 	
-	public Object createObject(String objId, Position3D position, Velocity3D velocity, AngularVelocity3D angularVelocity) {
-		if (objMap.containsKey(objId)) {
-			return null;
-		}
-		Object object = new Object(position, velocity, angularVelocity);
-		objMap.put(objId, object);
+	public Object createObject(String objId, Position3D position, Velocity3D velocity, AngularVelocity3D angularVelocity, Object.Attribute attribute) {
+		String id = createUniqueId(UNIQUE_ID_LENGTH, objMap.keySet());
+		Object object = new Object(position, velocity, angularVelocity, attribute);
+		objMap.put(id, object);
 		return object;
 	}
 	
-	public Area removeArea(String areaId) {
+	public Character createCharacter(URI accountURI, String name, Position3D position, String areaId, boolean isActive) {
+		String id = createUniqueId(UNIQUE_ID_LENGTH, characterMap.keySet());
+		Character character = new Character(accountURI, name, position, areaId, isActive);
+		characterMap.put(id, character);
+		return character;
+	}
+	
+	public Character destroyCharacter(String characterId) {
+		return characterMap.remove(characterId);
+	}
+	
+	public Area destroyArea(String areaId) {
 		return areaMap.remove(areaId);
 	}
 	
-	public Object removeObject(String objId) {
+	public Object destroyObject(String objId) {
 		return objMap.remove(objId);
 	}
 	
+	private String createUniqueId(int length, Set<String> idSet) {
+		String id;
+		do {
+			id = createRandomId(length);
+		} while (checkId(id, idSet));
+		return id;
+	}
+	
+	private boolean checkId(String id, Set<String> idSet) {
+		return idSet.contains(id);
+	}
+	
+	private String createRandomId(int length) {
+		StringBuilder id = new StringBuilder("");
+		do {
+			id.append(UUID.randomUUID().toString());
+		} while (id.length() < length);
+		return id.substring(0, length);
+	}
+
 	public static enum State {
 		AVAILABLE, MAINTENANCE;
 	}
diff --git a/src/main/java/cactusServer/entities/Object.java b/src/main/java/cactusServer/entities/Object.java
index 19054f0..8d9f067 100644
--- a/src/main/java/cactusServer/entities/Object.java
+++ b/src/main/java/cactusServer/entities/Object.java
@@ -10,11 +10,13 @@
 	private Position3D position;
 	private Velocity3D velocity;
 	private AngularVelocity3D angularVelocity;
+	private Attribute attribute;
 	
-	public Object(Position3D position, Velocity3D velocity, AngularVelocity3D angularVelocity) {
+	public Object(Position3D position, Velocity3D velocity, AngularVelocity3D angularVelocity, Attribute attribute) {
 		setPosition(position);
 		setVelocity(velocity);
 		setAngularVelocity(angularVelocity);
+		this.attribute = attribute;
 	}
 	
 	public Position3D getPosition() {
@@ -40,4 +42,22 @@
 	public void setAngularVelocity(AngularVelocity3D angularVelocity) {
 		this.angularVelocity = angularVelocity;
 	}
+	
+	public static class Attribute {
+		private boolean moveable;
+		private double cof;
+		
+		public Attribute(boolean moveable, double cof) {
+			this.moveable = moveable;
+			this.cof = cof;
+		}
+		
+		public boolean isMoveable() {
+			return moveable;
+		}
+		
+		public double getCof() {
+			return cof;
+		}
+	}
 }