The VG Resource

Update for 10/18:
Added more various costumes for the CPUs, Candidates and Adult Neptune.

Neptune (Alice Maid)

Blanc (Beach Girl)

Uzume Tennouboshi (Grim Reaper)

Nepgear (Cool Breeze Banquet)

Uni (Red Banquet)

Adult Neptune (Dark Angel)

Adult Neptune (Suspended Suit)

Purple Heart (Summer Fireworks)

Black Heart (Black Camellia)

White Heart (Sky Pearl Marriage)

Green Heart (Mint Garnet Dress)

And in honor of Neptunia Riders VS Dogoos coming out next year, here are the featured characters in their rider suits:

Neptune (Rider Suit)

Noire (Rider Suit)

Blanc (Rider Suit)

Vert (Rider Suit)

Uzume Tennouboshi (Rider Suit)

Update for 10/29:
Added Green Heart's Rose Witch Costume.

Green Heart (Rose Witch)

Also updated all of White and Green Heart's costumes.

Update for 2/9:
Added various costumes for the Goddesses, Candidates and Adult Nep.

Blanc (Baby Doll Santa)

Blanc (Strawberry Ice Cream)

Vert (Elegant Reindeer)

Vert (Maiden Apron)

Nepgear (Snow Queen Stage)

Uni (Snow Queen Stage)

White Heart (Snow White Shrine Maiden)

Green Heart (Early Green Shrine Maiden)

Adult Neptune (Military Snow White)

Adult Neptune (Cherry Blossom Shrine Maiden)

Update for 4/13:
Added Neptune's Spring Hina Doll Robe costume.

Neptune (Spring Hina Doll Robe)

Update for 6/6:
Added Adult Neptune's Gold Lily Wedding costume.

Adult Neptune (Gold Lily Wedding)

Update for 6/22:
Added Blanc and Vert's wedding costumes.

Blanc (Royal Blue Wedding)

Vert (Vertu Marriage)

Update for 7/18:
Added new swimsuits for White and Green Heart.

White Heart (Marine Sailor)

Green Heart (Summer Quinn)