Saint Seiya: Soldiers' Soul

You will be able to purchase the Silver Saints costumes once you complete all of the Legend of Cosmos arcs. In order to buy all of the Silver Saints costumes, you'll need a total of 20,000 CP. As a result, you can purchase these pretty early on if you want to get it out of the way. Additionally, you'll need to complete Tutorial mode to unlock one of Marin's skins (Training Gear). Once you've purchased the 2 Silver Saint characters and their skins, the trophy will unlock.