Earnest Carothy is found in World 6 of Magatsu Mandala within the Midnight Channel. It likes to use Evil Smile to inflict its foes with the Fear ailment, so it can use Ghastly Wail to finish them off. Alternatively, it may use Foolish Whisper to prevent the party from using their Personas. If there are multiple Carothy and the party is guarding they will use Megido to try and break party members' guard before using their status attacks. It may drop Activated Felt when defeated. Selling 10 Activated Felt will unlock the Blessed Hands accessory in the shop.
In Golden, Earnest Carothy, known as Earnest Calocy, attempts to Fear the party in order to use Ghastly Wail. It may debuff the party using Masukunda.