diff --git a/common/src/commonMain/kotlin/cz/frantisekmasa/wfrp_master/common/core/domain/character/Character.kt b/common/src/commonMain/kotlin/cz/frantisekmasa/wfrp_master/common/core/domain/character/Character.kt
index 6c5390693..c163c30ba 100644
--- a/common/src/commonMain/kotlin/cz/frantisekmasa/wfrp_master/common/core/domain/character/Character.kt
+++ b/common/src/commonMain/kotlin/cz/frantisekmasa/wfrp_master/common/core/domain/character/Character.kt
@@ -17,6 +17,7 @@ import dev.icerock.moko.parcelize.Parcelize
 import kotlinx.serialization.Contextual
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.JsonClassDiscriminator
 
 typealias LocalCharacterId = String
 
@@ -50,6 +51,7 @@ data class Character(
     val avatarUrl: String? = null,
     val money: Money = Money.ZERO,
     val hiddenTabs: Set<CharacterTab> = emptySet(),
+    val relationships: Map<LocalCharacterId, Relationship> = emptyMap(),
     val size: Size? = null,
 ) : Parcelable {
 
@@ -89,6 +91,18 @@ data class Character(
             characteristics,
         )
         require(points.wounds <= maxWounds) { "Wounds (${points.wounds} are greater than max Wounds ($maxWounds)" }
+        require(relationships.count { it.value is Relationship.Mount && it.value.riding } <= 1) {
+            "Character can ride at most one mount at he mount"
+        }
+    }
+
+    @JsonClassDiscriminator("type")
+    sealed interface Relationship {
+        @SerialName("FAMILIAR")
+        object Familiar : Relationship
+
+        @SerialName("MOUNT")
+        data class Mount(val riding: Boolean) : Relationship
     }
 
     @Parcelize
diff --git a/common/src/commonMain/kotlin/cz/frantisekmasa/wfrp_master/common/core/domain/character/CharacterType.kt b/common/src/commonMain/kotlin/cz/frantisekmasa/wfrp_master/common/core/domain/character/CharacterType.kt
index 1e3748225..6513f2e7e 100644
--- a/common/src/commonMain/kotlin/cz/frantisekmasa/wfrp_master/common/core/domain/character/CharacterType.kt
+++ b/common/src/commonMain/kotlin/cz/frantisekmasa/wfrp_master/common/core/domain/character/CharacterType.kt
@@ -3,4 +3,6 @@ package cz.frantisekmasa.wfrp_master.common.core.domain.character
 enum class CharacterType {
     PLAYER_CHARACTER,
     NPC,
+    FAMILIAR,
+    HIRELING,
 }
diff --git a/firebase/firestore.rules b/firebase/firestore.rules
index 6b2c279d8..6747a3448 100644
--- a/firebase/firestore.rules
+++ b/firebase/firestore.rules
@@ -539,7 +539,8 @@ service cloud.firestore {
                             "archived",
                             "woundsModifiers",
                             "compendiumCareer",
-                            "encumbranceBonus"
+                            "encumbranceBonus",
+                            "relationships",
                         ].hasAll(character.keys())
                         && character.id == characterId
                         && (
@@ -614,7 +615,8 @@ service cloud.firestore {
                             character.compendiumCareer.careerId is string && isValidUuid(character.compendiumCareer.careerId) &&
                             character.compendiumCareer.levelId is string && isValidUuid(character.compendiumCareer.levelId)
                         ))
-                        && character.encumbranceBonus is number && character.encumbranceBonus >= 0;
+                        && character.encumbranceBonus is number && character.encumbranceBonus >= 0
+                        && (! ("relationships" in character) || character.relationships is map);
                 }
             }