diff --git a/esphome/components/esp32_ble/__init__.py b/esphome/components/esp32_ble/__init__.py
index 974611c9b1..79d05049bf 100644
--- a/esphome/components/esp32_ble/__init__.py
+++ b/esphome/components/esp32_ble/__init__.py
@@ -373,14 +373,14 @@ def bt_uuid(value):
     value = in_value.upper()
 
     if len(value) == len(bt_uuid16_format):
-        pattern = re.compile("^[A-F|0-9]{4,}$")
+        pattern = re.compile("^[A-F0-9]{4,}$")
         if not pattern.match(value):
             raise cv.Invalid(
                 f"Invalid hexadecimal value for 16 bit UUID format: '{in_value}'"
             )
         return value
     if len(value) == len(bt_uuid32_format):
-        pattern = re.compile("^[A-F|0-9]{8,}$")
+        pattern = re.compile("^[A-F0-9]{8,}$")
         if not pattern.match(value):
             raise cv.Invalid(
                 f"Invalid hexadecimal value for 32 bit UUID format: '{in_value}'"
@@ -388,7 +388,7 @@ def bt_uuid(value):
         return value
     if len(value) == len(bt_uuid128_format):
         pattern = re.compile(
-            "^[A-F|0-9]{8,}-[A-F|0-9]{4,}-[A-F|0-9]{4,}-[A-F|0-9]{4,}-[A-F|0-9]{12,}$"
+            "^[A-F0-9]{8,}-[A-F0-9]{4,}-[A-F0-9]{4,}-[A-F0-9]{4,}-[A-F0-9]{12,}$"
         )
         if not pattern.match(value):
             raise cv.Invalid(
diff --git a/esphome/components/esp32_ble_beacon/__init__.py b/esphome/components/esp32_ble_beacon/__init__.py
index e2e790164e..8052c13596 100644
--- a/esphome/components/esp32_ble_beacon/__init__.py
+++ b/esphome/components/esp32_ble_beacon/__init__.py
@@ -10,11 +10,7 @@ AUTO_LOAD = ["esp32_ble"]
 DEPENDENCIES = ["esp32"]
 
 esp32_ble_beacon_ns = cg.esphome_ns.namespace("esp32_ble_beacon")
-ESP32BLEBeacon = esp32_ble_beacon_ns.class_(
-    "ESP32BLEBeacon",
-    cg.Component,
-    cg.Parented.template(esp32_ble.ESP32BLE),
-)
+ESP32BLEBeacon = esp32_ble_beacon_ns.class_("ESP32BLEBeacon", cg.Component)
 CONF_MAJOR = "major"
 CONF_MINOR = "minor"
 CONF_MIN_INTERVAL = "min_interval"
diff --git a/esphome/components/esp32_ble_beacon/esp32_ble_beacon.h b/esphome/components/esp32_ble_beacon/esp32_ble_beacon.h
index e16c413179..44a7133454 100644
--- a/esphome/components/esp32_ble_beacon/esp32_ble_beacon.h
+++ b/esphome/components/esp32_ble_beacon/esp32_ble_beacon.h
@@ -35,7 +35,7 @@ using esp_ble_ibeacon_t = struct {
 
 using namespace esp32_ble;
 
-class ESP32BLEBeacon : public Component, public Parented<ESP32BLE> {
+class ESP32BLEBeacon : public Component {
  public:
   explicit ESP32BLEBeacon(const std::array<uint8_t, 16> &uuid) : uuid_(uuid) {}
 
diff --git a/esphome/components/esp32_ble_server/__init__.py b/esphome/components/esp32_ble_server/__init__.py
index 57106cd93b..7bf3092a4e 100644
--- a/esphome/components/esp32_ble_server/__init__.py
+++ b/esphome/components/esp32_ble_server/__init__.py
@@ -307,24 +307,30 @@ def final_validate_config(config):
     # Check if all characteristics that require notifications have the notify property set
     for char_id in CORE.data.get(DOMAIN, {}).get(KEY_NOTIFY_REQUIRED, set()):
         # Look for the characteristic in the configuration
-        char_config = [
+        matches = [
             char_conf
             for service_conf in config[CONF_SERVICES]
             for char_conf in service_conf[CONF_CHARACTERISTICS]
             if char_conf[CONF_ID] == char_id
-        ][0]
+        ]
+        if not matches:
+            continue
+        char_config = matches[0]
         if not char_config[CONF_NOTIFY]:
             raise cv.Invalid(
                 f"Characteristic {char_config[CONF_UUID]} has notify actions and the {CONF_NOTIFY} property is not set"
             )
     for char_id in CORE.data.get(DOMAIN, {}).get(KEY_SET_VALUE, set()):
         # Look for the characteristic in the configuration
-        char_config = [
+        matches = [
             char_conf
             for service_conf in config[CONF_SERVICES]
             for char_conf in service_conf[CONF_CHARACTERISTICS]
             if char_conf[CONF_ID] == char_id
-        ][0]
+        ]
+        if not matches:
+            continue
+        char_config = matches[0]
         if isinstance(char_config.get(CONF_VALUE, {}).get(CONF_DATA), cv.Lambda):
             raise cv.Invalid(
                 f"Characteristic {char_config[CONF_UUID]} has both a set_value action and a templated value"
diff --git a/esphome/espota2.py b/esphome/espota2.py
index 4b813e4060..39f51e02e9 100644
--- a/esphome/espota2.py
+++ b/esphome/espota2.py
@@ -130,7 +130,7 @@ def check_error(data: list[int] | bytes, expect: int | list[int] | None) -> None
     :param expect: Expected response code(s), None to skip validation.
     :raises OTAError: If an error code is detected or response doesn't match expected.
     """
-    if not expect:
+    if expect is None:
         return
     if not data:
         raise OTAError(
@@ -278,7 +278,7 @@ def perform_ota(
             raise OTAError("ESP requests password, but no password given!")
 
         nonce_bytes = receive_exactly(
-            sock, nonce_size, f"{hash_name} authentication nonce", [], decode=False
+            sock, nonce_size, f"{hash_name} authentication nonce", None, decode=False
         )
         assert isinstance(nonce_bytes, bytes)
         nonce = nonce_bytes.decode()