Caldarus Fields of Mistria: Secret Romance Guide

Caldarus is the dragon guardian of Fields of Mistria and one of the two secret romanceable characters added with the 1.0 update, alongside Seridia. He is a dragon by species who was sealed away for centuries and only wakes when the player repairs a broken statue of him on the farm, unknowingly forming a pact with the guardian. Born on Spring 25, he suffers from amnesia after his long imprisonment and refers to the player as “mortal” in his grand, ancient speech. He cannot be romanced at all until you break the Fire Seal, which makes unlocking him one of the most involved quests in the game. This guide walks through exactly how to free him, where to find him, and how to win his heart.

Who He Is

Caldarus is the dragon guardian bound to Mistria, a legendary creature who was sealed away deep underground alongside the world’s magic. When you repair the broken statue of him on your farm, you unknowingly enter into a pact, and he starts appearing in your dreams asking for Essence in exchange for skill upgrades. He has amnesia from his long imprisonment, which gives him a distant, ancient manner as he tries to piece together his past. Despite his godlike tone, he is genuinely grateful to be free and to taste the modern world again, a warmth that shows through once you befriend him. He is one of the six bachelors, though the game treats him as a special character until you free him. His statue on the farm is where you upgrade your skills with Essence, which makes the dragon a practical part of daily life long before he becomes romanceable. For a broader look at who else is datable, the character overview is a handy starting point. As one of the secret candidates, he is only fully revealed to players who push deep into the mines and story.

How to Unlock Him (Breaking the Fire Seal)

Unlocking Caldarus centers on the Breaking the Fire Seal quest, which starts at floor 60 of the mines. There you will find a sealing tablet, and you need Juniper to translate it, which begins the hunt for four offering items: a Sealing Scroll, a Faceted Rock Gem, an Emerald, and a Rockroot. The Sealing Scroll is sourced through Balor, who will ask you to deposit 10 Silver Ingots, 10 Rubies, 10 Sapphires, and 10 Emeralds into the donation box beside his wagon before he hands it over. The Faceted Rock Gem comes from digging dig spots on floors 41 to 59, the Emerald is mined from emerald nodes in the Deep Earth, and the Rockroot is a foraged plant found on the same floors. Silver Ore appears in the mine floors before the Deep Earth, so plan your runs to gather the donation box materials in a few efficient trips. The Faceted Rock Gem is an archaeology artifact, which means luck plays a role; digging every dig spot you find on the right floors is the reliable path. For more on mining these materials efficiently, see our mines guide.

The Fire Seal Cutscene and His Human Form

Once all four items are placed on the Fire Seal altar at floor 60, the Priestess warns you to flee before the ritual goes wrong. The Sealing Scroll instead traps you in a circle that drains your health and stamina, and just as things look desperate, Caldarus appears, breaks the seal, and assumes his human form. He grants you the Dragon Breath spell and retreats to his temple in the Deep Woods, which is where you will find him from then on. To reach him, go to the Eastern Road, use Dragon Breath on the vines in the northeast to open the path, then chop the tree stump with at least a copper axe and follow the trail north to his temple. He cannot receive gifts at all until this quest is complete, so do not waste your cooked dishes before then. After the ritual, Caldarus lives in human form, which is the version you can date and marry. He wears seasonal outfits like the other villagers, including a beach outfit and a wedding outfit for the ceremony. The Dragon Breath spell he grants is also a practical tool, since it opens the path to the Deep Woods and unlocks new areas to explore.

Loved Gifts

Caldarus is wonderfully easy to please once he is unlocked, because nearly any cooked food counts as a loved gift. Standout favorites include the Sushi Platter, Mont Blanc, Apple Honey Curry, Fried Rice, Harvest Plate, Spring Galette, Seafood Boil, and Veggie Sub Sandwich, and his only non-food loved item is the Statuette of Caldarus, obtained through archaeology. The quickest strategy is to cook whatever you already have ingredients for, since the food category alone carries you far into his heart levels. He actively dislikes Dragon Parts and other universal dislikes, so keep those out of the gift slot. Because he cannot accept gifts until the seal is broken, stockpile cooked dishes in the meantime so you can flood him with loved food as soon as he becomes available. His appreciation for any cooked dish makes the kitchen the fastest route to his heart. Our Caldarus gift guide has the full breakdown when you want to optimize.

Romance Route Tips

After the Fire Seal is broken, Caldarus becomes a full marriage candidate and can be invited to festivals and dated like the others. Cook generously, hand over one dish per day, and talk to him regularly to build hearts, then follow the dating guide once heart events begin. His Spring 25 birthday is the perfect excuse to prepare a special dish, and since he starts with no gift history, your early progress comes quickly. As a secret candidate, he is also worth listing among the marriage candidates when you are planning your save file, since unlocking him requires serious mines progress anyway. Like the other secret candidate, Seridia, his romance arc is tied to endgame content, so expect to invest real time in the mines and story first. Once dating, he follows the same heart event system as the rest of the cast, and his temple in the Deep Woods is a useful waypoint that makes visiting him feel natural. With a full kitchen and a little patience, the ancient dragon guardian becomes one of the most charming partners in town.