diff --git a/geary-core/src/commonMain/kotlin/com/mineinabyss/geary/datatypes/IdList.kt b/geary-core/src/commonMain/kotlin/com/mineinabyss/geary/datatypes/IdList.kt
index 5a67166d8..1fa7a9fb4 100644
--- a/geary-core/src/commonMain/kotlin/com/mineinabyss/geary/datatypes/IdList.kt
+++ b/geary-core/src/commonMain/kotlin/com/mineinabyss/geary/datatypes/IdList.kt
@@ -1,9 +1,11 @@
 package com.mineinabyss.geary.datatypes
 
+import com.mineinabyss.geary.helpers.toGeary
+
 private const val initialSize: Int = 16
 private const val growFactor: Int = 2
 
-class IdList : Iterable<ULong> {
+class IdList {
     var backingArr = ULongArray(initialSize)
     var size = 0
     val lastIndex get() = size - 1
@@ -25,7 +27,7 @@ class IdList : Iterable<ULong> {
         return backingArr[--size]
     }
 
-    override fun iterator(): Iterator<ULong> {
-        return backingArr.iterator()
+    fun getEntities(): Sequence<Entity> {
+        return backingArr.asSequence().take(size).map { it.toGeary() }
     }
 }
diff --git a/geary-core/src/commonMain/kotlin/com/mineinabyss/geary/engine/archetypes/Archetype.kt b/geary-core/src/commonMain/kotlin/com/mineinabyss/geary/engine/archetypes/Archetype.kt
index 740796e5a..ca366251c 100644
--- a/geary-core/src/commonMain/kotlin/com/mineinabyss/geary/engine/archetypes/Archetype.kt
+++ b/geary-core/src/commonMain/kotlin/com/mineinabyss/geary/engine/archetypes/Archetype.kt
@@ -26,7 +26,7 @@ data class Archetype(
     private val eventRunner get() = archetypes.eventRunner
 
 
-    val entities: List<Entity> get() = ids.map { it.toGeary() }
+    val entities: Sequence<Entity> get() = ids.getEntities()
 
     /** The entity ids in this archetype. Indices are the same as [componentData]'s sub-lists. */
     private val ids: IdList = IdList()
diff --git a/geary-core/src/jvmTest/kotlin/com/mineinabyss/geary/datatypes/GearyEntityTests.kt b/geary-core/src/jvmTest/kotlin/com/mineinabyss/geary/datatypes/GearyEntityTests.kt
index 812f35726..09a9d9c1b 100644
--- a/geary-core/src/jvmTest/kotlin/com/mineinabyss/geary/datatypes/GearyEntityTests.kt
+++ b/geary-core/src/jvmTest/kotlin/com/mineinabyss/geary/datatypes/GearyEntityTests.kt
@@ -2,9 +2,7 @@ package com.mineinabyss.geary.datatypes
 
 import com.mineinabyss.geary.components.relations.InstanceOf
 import com.mineinabyss.geary.components.relations.Persists
-import com.mineinabyss.geary.helpers.componentId
-import com.mineinabyss.geary.helpers.entity
-import com.mineinabyss.geary.helpers.getArchetype
+import com.mineinabyss.geary.helpers.*
 import com.mineinabyss.geary.helpers.tests.GearyTest
 import com.mineinabyss.geary.modules.archetypes
 import com.mineinabyss.geary.systems.accessors.RelationWithData
@@ -136,6 +134,20 @@ internal class GearyEntityTests : GearyTest() {
         entity.getAllPersisting().shouldContainExactly("Test")
     }
 
+    @Nested
+    inner class ChildTest {
+        @Test
+        fun `should handle single parent child relation correctly when using addParent`() {
+            val parent = entity()
+            val child = entity {
+                addParent(parent)
+            }
+
+            parent.children.shouldContainExactly(child)
+            child.parents.shouldContainExactly(parent)
+        }
+    }
+
     @Nested
     inner class RelationTest {
         @Test