diff --git a/DragaliaAPI.Database/Entities/DbPlayerCharaData.cs b/DragaliaAPI.Database/Entities/DbPlayerCharaData.cs
index c221df0b0..47f6344dd 100644
--- a/DragaliaAPI.Database/Entities/DbPlayerCharaData.cs
+++ b/DragaliaAPI.Database/Entities/DbPlayerCharaData.cs
@@ -173,8 +173,10 @@ public DbPlayerCharaData() { }
     /// User-facing constructor.
     /// </summary>
     /// <param name="deviceAccountId">Primary key.</param>
+    /// <param name="id"></param>
+    /// <param name="isTemporary"></param>
     [SetsRequiredMembers]
-    public DbPlayerCharaData(string deviceAccountId, Charas id)
+    public DbPlayerCharaData(string deviceAccountId, Charas id, bool isTemporary = false)
     {
         CharaData data = MasterAsset.CharaData.Get(id);
 
@@ -210,5 +212,6 @@ public DbPlayerCharaData(string deviceAccountId, Charas id)
         this.Ability2Level = (byte)data.DefaultAbility2Level;
         this.Ability3Level = (byte)data.DefaultAbility3Level;
         this.IsUnlockEditSkill = data.Availability == CharaAvailabilities.Story;
+        this.IsTemporary = false;
     }
 }
diff --git a/DragaliaAPI.Database/Repositories/IUnitRepository.cs b/DragaliaAPI.Database/Repositories/IUnitRepository.cs
index 105b3203b..de19deabb 100644
--- a/DragaliaAPI.Database/Repositories/IUnitRepository.cs
+++ b/DragaliaAPI.Database/Repositories/IUnitRepository.cs
@@ -17,9 +17,12 @@ public interface IUnitRepository
 
     Task<bool> CheckHasDragons(IEnumerable<Dragons> idList);
 
-    Task<IEnumerable<(Charas id, bool isNew)>> AddCharas(IEnumerable<Charas> idList);
+    Task<IEnumerable<(Charas id, bool isNew)>> AddCharas(
+        IEnumerable<Charas> idList,
+        bool isTemporary = false
+    );
 
-    Task<bool> AddCharas(Charas id);
+    Task<bool> AddCharas(Charas id, bool isTemporary = false);
 
     Task<IEnumerable<(Dragons id, bool isNew)>> AddDragons(IEnumerable<Dragons> idList);
 
@@ -36,4 +39,5 @@ public interface IUnitRepository
     Task<IDictionary<Charas, IEnumerable<DbSetUnit>>> GetCharaSets(IEnumerable<Charas> charaId);
 
     Task<DbPlayerCharaData?> FindCharaAsync(Charas chara);
+    Task ClearIsTemporary(Charas id);
 }
diff --git a/DragaliaAPI.Database/Repositories/UnitRepository.cs b/DragaliaAPI.Database/Repositories/UnitRepository.cs
index 7667a2146..f0e9dad3c 100644
--- a/DragaliaAPI.Database/Repositories/UnitRepository.cs
+++ b/DragaliaAPI.Database/Repositories/UnitRepository.cs
@@ -85,11 +85,15 @@ public async Task<bool> CheckHasDragons(IEnumerable<Dragons> idList)
     /// <summary>
     /// Add a list of characters to the database. Will only add the first instance of any new character.
     /// </summary>
-    /// <param name="this.playerIdentityService.AccountId"></param>
     /// <param name="idList"></param>
+    /// <param name="isTemporary"></param>
+    /// <param name="this.playerIdentityService.AccountId"></param>
     /// <returns>A list of tuples which adds an additional dimension onto the input list,
     /// where the second item shows whether the given character id was a duplicate.</returns>
-    public async Task<IEnumerable<(Charas id, bool isNew)>> AddCharas(IEnumerable<Charas> idList)
+    public async Task<IEnumerable<(Charas id, bool isNew)>> AddCharas(
+        IEnumerable<Charas> idList,
+        bool isTemporary = false
+    )
     {
         List<Charas> addedChars = idList.ToList();
 
@@ -106,7 +110,7 @@ public async Task<bool> CheckHasDragons(IEnumerable<Dragons> idList)
         if (newCharas.Any())
         {
             IEnumerable<DbPlayerCharaData> dbEntries = newCharas.Select(
-                id => new DbPlayerCharaData(this.playerIdentityService.AccountId, id)
+                id => new DbPlayerCharaData(this.playerIdentityService.AccountId, id, isTemporary)
             );
 
             await apiContext.PlayerCharaData.AddRangeAsync(dbEntries);
@@ -147,9 +151,22 @@ out StoryData? story
         return newMapping;
     }
 
-    public async Task<bool> AddCharas(Charas id)
+    public async Task<bool> AddCharas(Charas id, bool isTemporary = false)
     {
-        return (await this.AddCharas(new[] { id })).First().isNew;
+        return (await this.AddCharas(new[] { id }, isTemporary)).First().isNew;
+    }
+
+    public async Task ClearIsTemporary(Charas id)
+    {
+        DbPlayerCharaData? chara = await this.Charas.FirstOrDefaultAsync(x => x.CharaId == id);
+        if (chara is null)
+        {
+            logger.LogWarning("Attempted to update temp flag of unowned character: {id}", id);
+            return;
+        }
+
+        logger.LogDebug("Set {id}.IsTemporary = false", id);
+        chara.IsTemporary = false;
     }
 
     public async Task<IEnumerable<(Dragons id, bool isNew)>> AddDragons(IEnumerable<Dragons> idList)
diff --git a/DragaliaAPI.Shared/MasterAsset/Models/Event/EventData.cs b/DragaliaAPI.Shared/MasterAsset/Models/Event/EventData.cs
index c607c3876..d664eb178 100644
--- a/DragaliaAPI.Shared/MasterAsset/Models/Event/EventData.cs
+++ b/DragaliaAPI.Shared/MasterAsset/Models/Event/EventData.cs
@@ -18,5 +18,7 @@ public record EventData(
     EntityTypes ViewEntityType4,
     int ViewEntityId4,
     EntityTypes ViewEntityType5,
-    int ViewEntityId5
+    int ViewEntityId5,
+    Charas EventCharaId,
+    int GuestJoinStoryId
 );
diff --git a/DragaliaAPI.Test/Services/DragonServiceTest.cs b/DragaliaAPI.Test/Services/DragonServiceTest.cs
index d6b777e5c..ef0e20149 100644
--- a/DragaliaAPI.Test/Services/DragonServiceTest.cs
+++ b/DragaliaAPI.Test/Services/DragonServiceTest.cs
@@ -378,7 +378,8 @@ public async Task DoDragonResetPlusCount_ResetsPlusCount()
                             50,
                             null,
                             null,
-                            null
+                            null,
+                            false
                         )
                     )
             )
diff --git a/DragaliaAPI.Test/Services/StoryServiceTest.cs b/DragaliaAPI.Test/Services/StoryServiceTest.cs
index c90d19b3d..399f9e827 100644
--- a/DragaliaAPI.Test/Services/StoryServiceTest.cs
+++ b/DragaliaAPI.Test/Services/StoryServiceTest.cs
@@ -234,7 +234,15 @@ public async Task ReadQuestStory_DragonReward_ReceivesReward()
             .Setup(
                 x =>
                     x.GrantReward(
-                        new Entity(EntityTypes.Dragon, (int)Dragons.Brunhilda, 1, null, null, null)
+                        new Entity(
+                            EntityTypes.Dragon,
+                            (int)Dragons.Brunhilda,
+                            1,
+                            null,
+                            null,
+                            null,
+                            false
+                        )
                     )
             )
             .ReturnsAsync(RewardGrantResult.Added);
diff --git a/DragaliaAPI/Features/Event/EventRepository.cs b/DragaliaAPI/Features/Event/EventRepository.cs
index 63d5be5ce..fed221013 100644
--- a/DragaliaAPI/Features/Event/EventRepository.cs
+++ b/DragaliaAPI/Features/Event/EventRepository.cs
@@ -1,5 +1,6 @@
 using DragaliaAPI.Database;
 using DragaliaAPI.Database.Entities;
+using DragaliaAPI.Database.Repositories;
 using DragaliaAPI.Models;
 using DragaliaAPI.Services.Exceptions;
 using DragaliaAPI.Shared.PlayerDetails;
@@ -7,12 +8,23 @@
 
 namespace DragaliaAPI.Features.Event;
 
-public class EventRepository(ApiContext apiContext, IPlayerIdentityService playerIdentityService)
-    : IEventRepository
+public class EventRepository(
+    ApiContext apiContext,
+    IPlayerIdentityService playerIdentityService,
+    IUserDataRepository userDataRepository
+) : IEventRepository
 {
     public IQueryable<DbPlayerEventData> EventData =>
         apiContext.PlayerEventData.Where(x => x.DeviceAccountId == playerIdentityService.AccountId);
 
+    public IQueryable<DbPlayerEventData> MemoryEventData =>
+        EventData.Join(
+            userDataRepository.UserData,
+            eventData => eventData.EventId,
+            userData => userData.ActiveMemoryEventId,
+            (eventData, userData) => eventData
+        );
+
     public IQueryable<DbPlayerEventReward> Rewards =>
         apiContext.PlayerEventRewards.Where(
             x => x.DeviceAccountId == playerIdentityService.AccountId
diff --git a/DragaliaAPI/Features/Event/EventService.cs b/DragaliaAPI/Features/Event/EventService.cs
index 5ae17cf4d..1c187e1dc 100644
--- a/DragaliaAPI/Features/Event/EventService.cs
+++ b/DragaliaAPI/Features/Event/EventService.cs
@@ -16,7 +16,8 @@ public class EventService(
     ILogger<EventService> logger,
     IEventRepository eventRepository,
     IRewardService rewardService,
-    IQuestRepository questRepository
+    IQuestRepository questRepository,
+    IUnitRepository unitRepository
 ) : IEventService
 {
     public async Task<bool> GetCustomEventFlag(int eventId)
@@ -191,6 +192,32 @@ public async Task CreateEventData(int eventId)
 
         if (neededEventPassiveIds.Count > 0)
             eventRepository.CreateEventPassives(eventId, neededEventPassiveIds);
+
+        // Memory events give their characters as temporary on starting
+        if (data.EventCharaId != Charas.Empty && data.IsMemoryEvent)
+        {
+            await rewardService.GrantReward(
+                new Entity(Type: EntityTypes.Chara, Id: (int)data.EventCharaId, IsTemporary: true)
+            );
+        }
+    }
+
+    public async Task<EventData?> GetMemoryEventAssetData()
+    {
+        int? memoryEventId = await eventRepository.MemoryEventData
+            .Select(x => x.EventId)
+            .Cast<int?>()
+            .FirstOrDefaultAsync();
+
+        if (
+            memoryEventId is null
+            || MasterAsset.EventData.TryGetValue(memoryEventId.Value, out EventData? result)
+        )
+        {
+            return null;
+        }
+
+        return result;
     }
 
     private async Task<DbPlayerEventData> GetEventData(int eventId)
diff --git a/DragaliaAPI/Features/Event/IEventRepository.cs b/DragaliaAPI/Features/Event/IEventRepository.cs
index 612230792..16086657f 100644
--- a/DragaliaAPI/Features/Event/IEventRepository.cs
+++ b/DragaliaAPI/Features/Event/IEventRepository.cs
@@ -5,6 +5,7 @@ namespace DragaliaAPI.Features.Event;
 public interface IEventRepository
 {
     IQueryable<DbPlayerEventData> EventData { get; }
+    IQueryable<DbPlayerEventData> MemoryEventData { get; }
     IQueryable<DbPlayerEventReward> Rewards { get; }
     IQueryable<DbPlayerEventItem> Items { get; }
     IQueryable<DbPlayerEventPassive> Passives { get; }
diff --git a/DragaliaAPI/Features/Event/IEventService.cs b/DragaliaAPI/Features/Event/IEventService.cs
index 850ae840d..41badb42e 100644
--- a/DragaliaAPI/Features/Event/IEventService.cs
+++ b/DragaliaAPI/Features/Event/IEventService.cs
@@ -1,4 +1,5 @@
 using DragaliaAPI.Models.Generated;
+using DragaliaAPI.Shared.MasterAsset.Models.Event;
 
 namespace DragaliaAPI.Features.Event;
 
@@ -37,4 +38,6 @@ int locationId
     Task<SimpleEventUserList> GetSimpleEventUserData(int eventId);
 
     #endregion
+
+    Task<EventData?> GetMemoryEventAssetData();
 }
diff --git a/DragaliaAPI/Features/Reward/Entity.cs b/DragaliaAPI/Features/Reward/Entity.cs
index 20a42a012..deb701fbb 100644
--- a/DragaliaAPI/Features/Reward/Entity.cs
+++ b/DragaliaAPI/Features/Reward/Entity.cs
@@ -9,7 +9,8 @@ public record Entity(
     int Quantity = 1,
     int? LimitBreakCount = null,
     int? BuildupCount = null,
-    int? EquipableCount = null
+    int? EquipableCount = null,
+    bool? IsTemporary = false
 // TODO: int? Level = null
 )
 {
diff --git a/DragaliaAPI/Features/Reward/RewardService.cs b/DragaliaAPI/Features/Reward/RewardService.cs
index 8c9e1a7fd..ffdae1022 100644
--- a/DragaliaAPI/Features/Reward/RewardService.cs
+++ b/DragaliaAPI/Features/Reward/RewardService.cs
@@ -37,7 +37,7 @@ public async Task<RewardGrantResult> GrantReward(Entity entity)
         switch (entity.Type)
         {
             case EntityTypes.Chara:
-                return await RewardCharacter(entity);
+                return await RewardCharacter(entity, entity.IsTemporary ?? false);
             case EntityTypes.Dragon:
                 for (int i = 0; i < entity.Quantity; i++)
                     await unitRepository.AddDragons((Dragons)entity.Id);
@@ -90,7 +90,7 @@ await inventoryRepository.GetMaterial((Materials)entity.Id)
         return RewardGrantResult.Added;
     }
 
-    private async Task<RewardGrantResult> RewardCharacter(Entity entity)
+    private async Task<RewardGrantResult> RewardCharacter(Entity entity, bool isTemporary)
     {
         if (entity.Type != EntityTypes.Chara)
             throw new ArgumentException("Entity was not a character", nameof(entity));
@@ -109,7 +109,7 @@ private async Task<RewardGrantResult> RewardCharacter(Entity entity)
         // TODO: Support EntityLevel/LimitBreak/etc here
 
         logger.LogDebug("Granted new character entity: {@entity}", entity);
-        await unitRepository.AddCharas(chara);
+        await unitRepository.AddCharas(chara, isTemporary);
         newEntities.Add(entity);
         return RewardGrantResult.Added;
     }
diff --git a/DragaliaAPI/Services/Game/StoryService.cs b/DragaliaAPI/Services/Game/StoryService.cs
index 314cb4abe..9db461bfe 100644
--- a/DragaliaAPI/Services/Game/StoryService.cs
+++ b/DragaliaAPI/Services/Game/StoryService.cs
@@ -1,6 +1,7 @@
 using System.Collections.Immutable;
 using DragaliaAPI.Database.Entities;
 using DragaliaAPI.Database.Repositories;
+using DragaliaAPI.Features.Event;
 using DragaliaAPI.Features.Fort;
 using DragaliaAPI.Features.Missions;
 using DragaliaAPI.Features.Reward;
@@ -8,12 +9,25 @@
 using DragaliaAPI.Models.Generated;
 using DragaliaAPI.Shared.Definitions.Enums;
 using DragaliaAPI.Shared.MasterAsset;
+using DragaliaAPI.Shared.MasterAsset.Models.Event;
 using DragaliaAPI.Shared.MasterAsset.Models.Story;
 using Microsoft.EntityFrameworkCore;
 
 namespace DragaliaAPI.Services.Game;
 
-public class StoryService : IStoryService
+public class StoryService(
+    IStoryRepository storyRepository,
+    ILogger<StoryService> logger,
+    IUserDataRepository userDataRepository,
+    IInventoryRepository inventoryRepository,
+    ITutorialService tutorialService,
+    IFortRepository fortRepository,
+    IMissionProgressionService missionProgressionService,
+    IRewardService rewardService,
+    IPaymentService paymentService,
+    IEventService eventService,
+    IUnitRepository unitRepository
+) : IStoryService
 {
     private const int DragonStoryWyrmite = 25;
     private const int CastleStoryWyrmite = 50;
@@ -21,39 +35,6 @@ public class StoryService : IStoryService
     private const int CharaStoryWyrmite2 = 10;
     private const int QuestStoryWyrmite = 25;
 
-    private readonly IStoryRepository storyRepository;
-    private readonly ILogger<StoryService> logger;
-    private readonly IUserDataRepository userDataRepository;
-    private readonly IInventoryRepository inventoryRepository;
-    private readonly ITutorialService tutorialService;
-    private readonly IFortRepository fortRepository;
-    private readonly IMissionProgressionService missionProgressionService;
-    private readonly IRewardService rewardService;
-    private readonly IPaymentService paymentService;
-
-    public StoryService(
-        IStoryRepository storyRepository,
-        ILogger<StoryService> logger,
-        IUserDataRepository userDataRepository,
-        IInventoryRepository inventoryRepository,
-        ITutorialService tutorialService,
-        IFortRepository fortRepository,
-        IMissionProgressionService missionProgressionService,
-        IRewardService rewardService,
-        IPaymentService paymentService
-    )
-    {
-        this.storyRepository = storyRepository;
-        this.logger = logger;
-        this.userDataRepository = userDataRepository;
-        this.inventoryRepository = inventoryRepository;
-        this.tutorialService = tutorialService;
-        this.fortRepository = fortRepository;
-        this.missionProgressionService = missionProgressionService;
-        this.rewardService = rewardService;
-        this.paymentService = paymentService;
-    }
-
     #region Eligibility check methods
     public async Task<bool> CheckStoryEligibility(StoryTypes type, int storyId)
     {
@@ -247,7 +228,26 @@ await rewardService.GrantReward(
             }
         }
 
-        logger.LogInformation("Granted rewards for reading new story: {rewards}", rewardList);
+        EventData? memoryEventData = await eventService.GetMemoryEventAssetData();
+        if (memoryEventData?.GuestJoinStoryId == storyId)
+        {
+            logger.LogDebug(
+                "Setting chara {id} to permanently owned",
+                memoryEventData.EventCharaId
+            );
+
+            await unitRepository.ClearIsTemporary(memoryEventData.EventCharaId);
+            rewardList.Add(
+                new AtgenBuildEventRewardEntityList()
+                {
+                    entity_id = (int)memoryEventData.EventCharaId,
+                    entity_quantity = 1,
+                    entity_type = EntityTypes.Chara
+                }
+            );
+        }
+
+        logger.LogInformation("Granted rewards for reading new story: {@rewards}", rewardList);
         return rewardList;
     }