Eva's Knight Lionel Hunter:
You haven't finished all the tests. In order to overcome your limit, you must pass all the tests.
You must overcome not just the limit of the power you were born with, but also the limit of the new power you obtained.
Make sure your Lv. 104. Then, go find Sporcha in Refugee Village, Captain Krenaht in the Giants Cave, the Santiago, and Arcturus in the Hunters Village, and pass the tests they give you.
It's best that you hear about the tests from them. Remember to bring back their certificates.