diff --git a/.claude/skills/api-guide/SKILL.md b/.claude/skills/api-guide/SKILL.md
index 85784045f4d..3601031c58e 100644
--- a/.claude/skills/api-guide/SKILL.md
+++ b/.claude/skills/api-guide/SKILL.md
@@ -239,7 +239,37 @@ GraphQL Resolver → check_admin_only (if admin) → Processor → Service → R
 - NEVER put optional fields in Scope - use Filter instead
 - Scope fields must all be required (no default values, no Optional types)
 
+### Cross-Entity Reference Resolvers
+
+When a GQL node references another entity node, use `strawberry.lazy()` to avoid circular imports. Strawberry requires runtime type resolution, so `TYPE_CHECKING` imports alone are insufficient.
+
+**Pattern:**
+```python
+# 1. TYPE_CHECKING: for static analysis (mypy)
+if TYPE_CHECKING:
+    from ai.backend.manager.api.gql.domain_v2.types.node import DomainV2GQL
+
+# 2. Return type: Annotated with strawberry.lazy() for runtime resolution
+# 3. Function body: runtime import + DataLoader
+async def domain(self, info: Info[StrawberryGQLContext]) -> Annotated[
+    DomainV2GQL,
+    strawberry.lazy("ai.backend.manager.api.gql.domain_v2.types.node"),
+]:
+    from ai.backend.manager.api.gql.domain_v2.types.node import DomainV2GQL
+    data = await info.context.data_loaders.domain_loader.load(self.domain_name)
+    return DomainV2GQL.from_data(data)
+```
+
+**Optional return type:** `| None` must be **outside** `Annotated[]`:
+```python
+) -> Annotated[DomainV2GQL, strawberry.lazy("...")] | None:  # ✅
+) -> Annotated[DomainV2GQL | None, strawberry.lazy("...")]:   # ❌ lazy cannot resolve union
+```
+
+**DataLoaders** (`info.context.data_loaders`): Use DataLoaders instead of individual fetch functions to prevent N+1 queries. See `api/gql/data_loader/data_loaders.py` for available loaders.
+
 **See examples:**
+- `api/gql/fair_share/types/domain.py` - Cross-entity reference with DataLoader
 - `api/gql/domain_v2/types/node.py` - DomainV2GQL with fair_shares/usage_buckets
 - `api/gql/fair_share/types/*.py` - Scope and Filter patterns
 
diff --git a/changes/8702.feature.md b/changes/8702.feature.md
new file mode 100644
index 00000000000..776686c410f
--- /dev/null
+++ b/changes/8702.feature.md
@@ -0,0 +1 @@
+Apply DataLoaders to fair share entity back-reference resolvers
\ No newline at end of file
diff --git a/docs/manager/graphql-reference/supergraph.graphql b/docs/manager/graphql-reference/supergraph.graphql
index ad814057dbe..06bc29119d2 100644
--- a/docs/manager/graphql-reference/supergraph.graphql
+++ b/docs/manager/graphql-reference/supergraph.graphql
@@ -3341,7 +3341,7 @@ type DomainFairShare implements Node
   """
   Added in 26.2.0. The domain entity associated with this fair share record.
   """
-  domain: DomainV2!
+  domain: DomainV2
 }
 
 """
@@ -7594,7 +7594,7 @@ type ProjectFairShare implements Node
   """
   Added in 26.2.0. The project entity associated with this fair share record.
   """
-  project: ProjectV2!
+  project: ProjectV2
 }
 
 """
@@ -11412,7 +11412,7 @@ type UserFairShare implements Node
   """
   Added in 26.2.0. The user entity associated with this fair share record.
   """
-  user: UserV2!
+  user: UserV2
 }
 
 """
diff --git a/docs/manager/graphql-reference/v2-schema.graphql b/docs/manager/graphql-reference/v2-schema.graphql
index 5d8029307ab..52c269d2b7b 100644
--- a/docs/manager/graphql-reference/v2-schema.graphql
+++ b/docs/manager/graphql-reference/v2-schema.graphql
@@ -1731,7 +1731,7 @@ type DomainFairShare implements Node {
   """
   Added in 26.2.0. The domain entity associated with this fair share record.
   """
-  domain: DomainV2!
+  domain: DomainV2
 }
 
 """
@@ -3975,7 +3975,7 @@ type ProjectFairShare implements Node {
   """
   Added in 26.2.0. The project entity associated with this fair share record.
   """
-  project: ProjectV2!
+  project: ProjectV2
 }
 
 """
@@ -6526,7 +6526,7 @@ type UserFairShare implements Node {
   """
   Added in 26.2.0. The user entity associated with this fair share record.
   """
-  user: UserV2!
+  user: UserV2
 }
 
 """
diff --git a/src/ai/backend/manager/api/gql/fair_share/types/domain.py b/src/ai/backend/manager/api/gql/fair_share/types/domain.py
index e87e4775366..2cdc72b45c4 100644
--- a/src/ai/backend/manager/api/gql/fair_share/types/domain.py
+++ b/src/ai/backend/manager/api/gql/fair_share/types/domain.py
@@ -12,7 +12,7 @@
 from strawberry.relay import Connection, Edge, Node, NodeID
 
 from ai.backend.manager.api.gql.base import OrderDirection, StringFilter
-from ai.backend.manager.api.gql.types import GQLFilter, GQLOrderBy
+from ai.backend.manager.api.gql.types import GQLFilter, GQLOrderBy, StrawberryGQLContext
 from ai.backend.manager.data.fair_share.types import DomainFairShareData
 from ai.backend.manager.repositories.base import (
     QueryCondition,
@@ -65,14 +65,20 @@ class DomainFairShareGQL(Node):
     )
     async def domain(
         self,
-        info: Info,
-    ) -> Annotated[
-        DomainV2GQL,
-        strawberry.lazy("ai.backend.manager.api.gql.domain_v2.types.node"),
-    ]:
-        from ai.backend.manager.api.gql.domain_v2.fetcher.domain import fetch_domain
-
-        return await fetch_domain(info=info, domain_name=self.domain_name)
+        info: Info[StrawberryGQLContext],
+    ) -> (
+        Annotated[
+            DomainV2GQL,
+            strawberry.lazy("ai.backend.manager.api.gql.domain_v2.types.node"),
+        ]
+        | None
+    ):
+        from ai.backend.manager.api.gql.domain_v2.types.node import DomainV2GQL
+
+        domain_data = await info.context.data_loaders.domain_loader.load(self.domain_name)
+        if domain_data is None:
+            return None
+        return DomainV2GQL.from_data(domain_data)
 
     @classmethod
     def from_dataclass(cls, data: DomainFairShareData) -> DomainFairShareGQL:
diff --git a/src/ai/backend/manager/api/gql/fair_share/types/project.py b/src/ai/backend/manager/api/gql/fair_share/types/project.py
index d4a864eae97..14c61867e3e 100644
--- a/src/ai/backend/manager/api/gql/fair_share/types/project.py
+++ b/src/ai/backend/manager/api/gql/fair_share/types/project.py
@@ -13,7 +13,7 @@
 from strawberry.relay import Connection, Edge, Node, NodeID
 
 from ai.backend.manager.api.gql.base import OrderDirection, StringFilter, UUIDFilter
-from ai.backend.manager.api.gql.types import GQLFilter, GQLOrderBy
+from ai.backend.manager.api.gql.types import GQLFilter, GQLOrderBy, StrawberryGQLContext
 from ai.backend.manager.data.fair_share.types import ProjectFairShareData
 from ai.backend.manager.data.group.types import ProjectType
 from ai.backend.manager.repositories.base import (
@@ -68,14 +68,20 @@ class ProjectFairShareGQL(Node):
     )
     async def project(
         self,
-        info: Info,
-    ) -> Annotated[
-        ProjectV2GQL,
-        strawberry.lazy("ai.backend.manager.api.gql.project_v2.types.node"),
-    ]:
-        from ai.backend.manager.api.gql.project_v2.fetcher.project import fetch_project
-
-        return await fetch_project(info=info, project_id=self.project_id)
+        info: Info[StrawberryGQLContext],
+    ) -> (
+        Annotated[
+            ProjectV2GQL,
+            strawberry.lazy("ai.backend.manager.api.gql.project_v2.types.node"),
+        ]
+        | None
+    ):
+        from ai.backend.manager.api.gql.project_v2.types.node import ProjectV2GQL
+
+        project_data = await info.context.data_loaders.project_loader.load(self.project_id)
+        if project_data is None:
+            return None
+        return ProjectV2GQL.from_data(project_data)
 
     @classmethod
     def from_dataclass(cls, data: ProjectFairShareData) -> ProjectFairShareGQL:
diff --git a/src/ai/backend/manager/api/gql/fair_share/types/user.py b/src/ai/backend/manager/api/gql/fair_share/types/user.py
index 4f2fedbd1ef..217a76ecbda 100644
--- a/src/ai/backend/manager/api/gql/fair_share/types/user.py
+++ b/src/ai/backend/manager/api/gql/fair_share/types/user.py
@@ -13,7 +13,7 @@
 from strawberry.relay import Connection, Edge, Node, NodeID
 
 from ai.backend.manager.api.gql.base import OrderDirection, StringFilter, UUIDFilter
-from ai.backend.manager.api.gql.types import GQLFilter, GQLOrderBy
+from ai.backend.manager.api.gql.types import GQLFilter, GQLOrderBy, StrawberryGQLContext
 from ai.backend.manager.data.fair_share.types import UserFairShareData
 from ai.backend.manager.repositories.base import (
     QueryCondition,
@@ -68,14 +68,20 @@ class UserFairShareGQL(Node):
     )
     async def user(
         self,
-        info: Info,
-    ) -> Annotated[
-        UserV2GQL,
-        strawberry.lazy("ai.backend.manager.api.gql.user_v2.types.node"),
-    ]:
-        from ai.backend.manager.api.gql.user_v2.fetcher.user import fetch_user
-
-        return await fetch_user(info=info, user_uuid=self.user_uuid)
+        info: Info[StrawberryGQLContext],
+    ) -> (
+        Annotated[
+            UserV2GQL,
+            strawberry.lazy("ai.backend.manager.api.gql.user_v2.types.node"),
+        ]
+        | None
+    ):
+        from ai.backend.manager.api.gql.user_v2.types.node import UserV2GQL
+
+        user_data = await info.context.data_loaders.user_loader.load(self.user_uuid)
+        if user_data is None:
+            return None
+        return UserV2GQL.from_data(user_data)
 
     @classmethod
     def from_dataclass(cls, data: UserFairShareData) -> UserFairShareGQL: