Shop › HEROIC DUO KEYCHAIN Image 1 of 1 HEROIC DUO KEYCHAIN $7.00 A 1.5-inch acrylic keychain featuring the Percy and Mirai from the God Punch and Blade Titans series. Add To Bag Added! A 1.5-inch acrylic keychain featuring the Percy and Mirai from the God Punch and Blade Titans series.