Blue Angel - Final by Quarkyifu

Angel wants to be a great adventurer.
She applies to the guild for membership but is denied even though she passed all the tests.
She appeals her case to the Queens consul and eventually ends up meeting the Queen who assigns her a quest to prove her worthiness. Unbeknownst to Angel, the Queen is fond of her and sends Tomoka the Cat Girl from her royal guard to follow Angel and secretly watch her.