diff --git a/src/unihan_db/importer.py b/src/unihan_db/importer.py
index e188dcb8..287bbbee 100644
--- a/src/unihan_db/importer.py
+++ b/src/unihan_db/importer.py
@@ -49,9 +49,13 @@ def import_char(
     c: Unhn,
     char: t.Dict[
         str,
-        t.Dict[
-            str,
-            t.Union[int, str, t.List[t.Dict[str, object]], t.Dict[str, object]],
+        t.Union[
+            t.Dict[
+                str,
+                t.Union[int, str, t.List[t.Dict[str, object]], t.Dict[str, object]],
+            ],
+            t.List[t.Dict[str, object]],
+            t.Dict[str, object],
         ],
     ],
 ):  # NOQA: C901
@@ -253,17 +257,22 @@ def import_char(
         ("kIRG_VSource", kIRG_VSource, c.kIRG_VSource),
     )
 
-    for f, model, column in irg_fields:
+    for f, Model, column in irg_fields:
         if f in char:
-            d = char[f]
-            k = model(source=d["source"], location=d["location"])
-            column.append(k)
+            _md = char[f]
+            assert isinstance(_md, dict)
+            column.append(Model(source=_md["source"], location=_md["location"]))
 
     if "kGSR" in char:
-        for d in char["kGSR"]:
-            assert isinstance(d, dict)
-            k = kGSR(set=d["set"], letter=d["letter"], apostrophe=d["apostrophe"])
-            c.kGSR.append(k)
+        for _kgsr in char["kGSR"]:
+            assert isinstance(_kgsr, dict)
+            c.kGSR.append(
+                kGSR(
+                    set=_kgsr["set"],
+                    letter=_kgsr["letter"],
+                    apostrophe=_kgsr["apostrophe"],
+                )
+            )
 
     if "kCheungBauerIndex" in char:
         kcbi = char["kCheungBauerIndex"]