Agrias and the Tynar Rouge/Tinker Lip Item

Make sure that you still have Lavian and Alicia (Agrias' guards from Chapter 1) still in your party in Chapter 4 and have at least 500k gil. Land on a City on Cancer I and you will see a cutscene where an embarrased Mustadio gives a birthday gift to Agrias. You will now have the lip-rouge which is a great stat-boosting accessory for female characters.