To unlock Ryu's armour, you need to complete a three - star quest pinned to the arena quest board called «Down the Dark, Muddy Path». (cogconnected.com)
This is because, in addition to the SRPG - style story missions and the JRPG - style quest board, stores, and skill progressions, there's a myriad of extra things to pay attention to. (mypotatogames.com)
Every good adventurer knows that a journey of a thousand steps begins with some fetch quests and escort missions so you load up on both from the local quest boards located in the few habitable villages of Gransys. (ludonarrativeassonance.com)