Fire Spirit Cookies are the most numerous and outgoing legendaries out so far, commonly interacting with non-cookie beings and actively helping out occasionally in communities even when not adopted into a home. Due to this, they're much more widely accepted and have more freedom than other, 'wilder' legendaries, but aren't often allowed in cookie rest stops due to their tendencies to burn everything they touch when overexcited (excluding lord of ash variants, but are kept out of rest stops anyways to be safe).
Fire Spirit Cookies are also surprisingly choosy with who adopts them, so they've made it into a little game! Depending on what human they choose, they will constantly pester and dart around the human, should they successfully capture the fire spirit, he will then declare they are now family and will allow himself to be taken to his new home. This sort of game can vary on difficulty depending on what variant you're trying to capture, since they come in four seperate variants, Normal, Lord of Ash, Lord of Flame, and the rarer Immortal Cataclysm variant, each variant has a usual difficulty of capture, normal Fire Spirit Cookies are pretty average in difficulty, lord of ash variants are the easiest, usually having no energy to move, if at all, lord of flames variants are always on the move and don't usually fall for the heat pad trick, making them the most difficult to capture, and Immortal Cataclysm variants are the most unpredictable, being a mix of both lord of ash and lord of flame variants, but the drawback is that they only appear in areas that has frequent major fires, such as near volcanos or large areas of dry shrubbery when ignoring they could be moping one moment, and zooming the next, in any case, Fire Spirits are a good addition to many households, though maybe don't put them with a sea fairy...
Fire Spirit Cookies also love to gather in groups to share and conserve magic reserves during colder months, though will do it during warmer days as well, its not uncommon to find a colony of fire spirit cookies in basements or attics within abandoned buildings, or hiding within nooks and crannies created by rock formations or abandoned animal dens, a colony can consist of 5 to a whopping 20 indivuduals. Groups of fire spirits also have names, small groups are called hearths, and larger groups are called a bonfire (ex: a bonfire of fire spirits was found in the attic, a hearth of fire spirits was found near a cookie rest stop).