MYSQL: best utf setting for ACCENT sensitive but CASE insensitive

Question

For example, ἐν or Ἐν are the same, but should be distinguished from ἕν/Ἓν. I've tried utf8_bin which seems to be the closest, but is also case sensitive.

Answer 1

mysql> select 'ἐν' = 'Ἐν' collate utf8mb4_0900_as_ci;
+----------------------------------------------+
| 'ἐν' = 'Ἐν' collate utf8mb4_0900_as_ci       |
+----------------------------------------------+
|                                            1 |
+----------------------------------------------+

mysql> select 'ἐν' = 'ἕν' collate utf8mb4_0900_as_ci;
+----------------------------------------------+
| 'ἐν' = 'ἕν' collate utf8mb4_0900_as_ci       |
+----------------------------------------------+
|                                            0 |
+----------------------------------------------+