Just finished an initial check for Booster Box 5. Only found a few errors:
Missing - Sophia, Prophet of the Hidden Village
Labeled as PR05-008PR on the wiki
Extra - Caeda, Mystical Pegasus Knight
Labeled incorrectly on the wiki as B05-006HN, when it should be B04-006HN
Incorrect - Lilina, Lady of Ostia
Her first support skill has the name and support type of her second support skill, while her second support skill itself is missing entirely.
Incorrect - Roy, Young Lord of Pherae
Same as Lilina.
Other than that, the set is really nice. Thanks again for all your hard work! I'll try to let you know should I find anything else. Good luck.