You can find on the subpages the accessories you will find to use in Aika. They have been split into categories:
Novice Accessories - these are available from the NPC Jess Girl in Regenshein. The tier 1 accessories require you to craft a recipe to get refined steel. Unrefined steel drops from the last boss in Zantorian Hell and Marauder Hold Hell. The T2 require you to craft a recipe to get a Platinum ingot. Unrefined platinum drops in Marauder Cabin Hell from the last boss, and the Golems. Alternatively you can craft the T2 from the T1.