diff --git a/src/entity/character.rs b/src/entity/character.rs
index d10fc44..fe856e7 100644
--- a/src/entity/character.rs
+++ b/src/entity/character.rs
@@ -227,9 +227,13 @@ pub struct CharacterGuildCard {
     pub description: String,
 }
 
+
+#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
+pub struct CharacterEntityId(pub u32);
+
 #[derive(Clone)]
 pub struct CharacterEntity {
-    pub id: u32,
+    pub id: CharacterEntityId,
     pub user_id: u32,
     pub slot: u32,
 
@@ -249,7 +253,7 @@ pub struct CharacterEntity {
 impl std::default::Default for CharacterEntity {
     fn default() -> CharacterEntity {
         CharacterEntity {
-            id: 0,
+            id: CharacterEntityId(0),
             user_id: 0,
             slot: 0,
             name: "".into(),
diff --git a/src/entity/gateway/inmemory.rs b/src/entity/gateway/inmemory.rs
index 15c90b5..292024a 100644
--- a/src/entity/gateway/inmemory.rs
+++ b/src/entity/gateway/inmemory.rs
@@ -15,7 +15,7 @@ use std::sync::{Arc, Mutex};
 pub struct InMemoryGateway {
     users: Arc<Mutex<HashMap<u32, UserAccount>>>,
     user_settings: Arc<Mutex<HashMap<u32, UserSettings>>>,
-    characters: Arc<Mutex<HashMap<u32, CharacterEntity>>>,
+    characters: Arc<Mutex<HashMap<CharacterEntityId, CharacterEntity>>>,
     items: Arc<Mutex<HashMap<ItemEntityId, Item>>>,
 }
 
@@ -86,13 +86,13 @@ impl EntityGateway for InMemoryGateway {
         let mut characters = self.characters.lock().unwrap();
         let id = characters 
             .iter()
-            .fold(0, |sum, (i, _)| std::cmp::max(sum, *i))
+            .fold(0, |sum, (i, _)| std::cmp::max(sum, i.0))
             + 1;
 
         let mut c = CharacterEntity::default();
-        c.id = id;
+        c.id = CharacterEntityId(id);
         c.user_id = user.id;
-        characters.insert(id, c.clone());
+        characters.insert(CharacterEntityId(id), c.clone());
         c
     }
 
diff --git a/src/entity/item/mod.rs b/src/entity/item/mod.rs
index 3c0cb13..9895bfb 100644
--- a/src/entity/item/mod.rs
+++ b/src/entity/item/mod.rs
@@ -6,22 +6,25 @@ pub mod tech;
 pub mod unit;
 pub mod mag;
 
+use crate::entity::character::CharacterEntityId;
+
 #[derive(PartialEq, Copy, Clone, Debug, Hash, Eq)]
 pub struct ItemEntityId(pub u32);
 #[derive(Hash, PartialEq, Eq, Debug, Clone)]
 pub struct ItemId(u32);
-
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct BankName(String);
 
 #[derive(Clone, Debug, PartialEq)]
 pub enum ItemLocation {
     Inventory {
-        character_id: u32,
+        character_id: CharacterEntityId,
         index: usize,
         equipped: bool,
     },
     Bank {
-        character_id: u32,
-        slot: usize,
+        character_id: CharacterEntityId,
+        slot: BankName,
     },
     Floor {
         // floor: eventually
diff --git a/src/ship/items.rs b/src/ship/items.rs
index 6875d6d..7a11221 100644
--- a/src/ship/items.rs
+++ b/src/ship/items.rs
@@ -172,6 +172,7 @@ impl ActiveItemDatabase {
 #[cfg(test)]
 mod test {
     use super::*;
+    use crate::entity::character::CharacterEntityId;
     use crate::entity::item;
     use crate::entity::item::{Item, ItemDetail, ItemEntityId, ItemLocation};
     #[test]
@@ -179,7 +180,7 @@ mod test {
         let item1 = Item {
             id: ItemEntityId(1),
             location: ItemLocation::Inventory {
-                character_id: 0,
+                character_id: CharacterEntityId(0),
                 index: 0,
                 equipped: false,
             },
@@ -194,7 +195,7 @@ mod test {
         let item2 = Item {
             id: ItemEntityId(2),
             location: ItemLocation::Inventory {
-                character_id: 0,
+                character_id: CharacterEntityId(0),
                 index: 1,
                 equipped: false,
             },
@@ -205,7 +206,7 @@ mod test {
         let item3 = Item {
             id: ItemEntityId(3),
             location: ItemLocation::Inventory {
-                character_id: 0,
+                character_id: CharacterEntityId(0),
                 index: 2,
                 equipped: false,
             },
@@ -220,7 +221,7 @@ mod test {
         let item4  = Item {
             id: ItemEntityId(4),
             location: ItemLocation::Inventory {
-                character_id: 0,
+                character_id: CharacterEntityId(0),
                 index: 1,
                 equipped: false,
             },
@@ -231,7 +232,7 @@ mod test {
         let item5 = Item {
             id: ItemEntityId(5),
             location: ItemLocation::Inventory {
-                character_id: 0,
+                character_id: CharacterEntityId(0),
                 index: 1,
                 equipped: false,
             },
@@ -242,7 +243,7 @@ mod test {
         let item6 = Item {
             id: ItemEntityId(6),
             location: ItemLocation::Inventory {
-                character_id: 0,
+                character_id: CharacterEntityId(0),
                 index: 3,
                 equipped: false,
             },
@@ -257,7 +258,7 @@ mod test {
         let item7 = Item {
             id: ItemEntityId(7),
             location: ItemLocation::Inventory {
-                character_id: 0,
+                character_id: CharacterEntityId(0),
                 index: 4,
                 equipped: false,
             },
@@ -268,7 +269,7 @@ mod test {
         let item8 = Item {
             id: ItemEntityId(8),
             location: ItemLocation::Inventory {
-                character_id: 0,
+                character_id: CharacterEntityId(0),
                 index: 4,
                 equipped: false,
             },
@@ -279,7 +280,7 @@ mod test {
         let item9 = Item {
             id: ItemEntityId(9),
             location: ItemLocation::Inventory {
-                character_id: 0,
+                character_id: CharacterEntityId(0),
                 index: 4,
                 equipped: false,
             },