The Additional PP Pack will increase your PP by 5,000! PP are shared points for your entire party and can be used to increase anyone's stats. It's up to you whether to assign them equally or spoil certain members by giving them more points.
The Fallen Angel Pack contains 1 Krishna, 2 Black Frame, 2 Black Bustier, 2 Angel Wing, 2 Angel Halo, 2 Magic Up+, and 2 Resist Magic Up+. If you think of these as items that young ladies who were unhappy with the heavens left behind, don't they suddenly seem priceless?
The Dull Things Pack contains 2 Rusty Sword, 2 Rusty Bracelet, 2 Rusty Ring, 1 Anglachel, 1 Dainslaif, and 1 Ginna's scythe. Make sure you've had your shots first!
The Legendary Monster Pack contains Seiryu's Sword, Genbu's Gauntlet, Byakko's Bracelet, Suzaku's Ring, 2 Accuracy Up+, and 2 Evasion Up+. Rumor says that you might be blessed with Yellow Dragon's aegis if you equip them all.