Some useful accessories info:
Once you get the Ideal Gel, you can transform a level 10 accessory. Here are the five I've got, and their transformed (ultimate) version with attributes.
Fairy Ring -> Tritania's Ring (EP +1100, Charm +517, WP +376, Luck+9, Luxurious Chance +10%)
Sterile Handkerchief -> Stained Tissue (EP +1100, Charm +470, WP +470, Max EP +20%)
Broken Watch -> Warped Watch (EP +1100, Charm +564, WP +470, Luck -10, Mood Increase Rate +20%, Luxurious Rate +20%)
Old Wax Candle -> Phantom Candle (EP +1100, Charm +376, WP +517, EP Recovery +20%)
Red Feathers -> Phoenix Feathers (EP +1100, Charm +517, WP +423, Luxurious Power +30%, Max Life +5%)
I'll update this when I find more accessories.