Mythic creatures are able to disguise themselves perfectly as humans. They can shift between forms at will, and any outfits or apparel that they wore in human form are magically “saved” for when they transform back, thus they don’t have to worry about their personal items being damaged by the transformation. While in human form, a creature’s magic abilities are heavily suppressed. A dragon capable of burning down a village in its mythic form may be able to heat some tea or sear a steak in human form. When using magic in human form, some physical feature of their mythic form will surface. A dragon would, perhaps display reptilian eyes for a moment, or gain a temporary patch of scales. Thus, to preserve their secrets, such creatures do not use their powers in the presence of humans. Their physical attributes, such as strength, speed, and senses, are those of a human, albeit a particularly fit or perceptive human. This also means, though, that they are perfectly mortal in their human form. Injuries sustained as a human carry over into their mythic form.
All mythic creatures intrinsically know what species another is, even in human form. However, it is considered very poor form to address one by their race unless they address themselves as such first. For example: “We leviathans do love a good swim!” “Well, my estate has a lake that could surely accommodate even a leviathan as great as you!” It is unthinkable that a creature would disclose any such information to humans, though. After all, it would shatter the centuries long charade that the families have worked so hard to construct. Besides, who would believe such an outrageous claim anyway?
Mythic creatures live longer lives than humans, typically as old as 3 centuries. To maintain their façade, they need to create new identities from time to time. Their human forms age as humans do, but can be refreshed as needed. Old Lord Pembleton just passed away in his sleep… but here comes cousin Jenkins from the countryside whom no one has met before *wink wink.* Thus, mythic creatures will have numerous human names over the course of their life, but have one “true” mythic name to go by among their family.
Romance between races is not at all unusual. Aristocratic courtship is generally conducted in human form, for when creatures take on their mythic form they drop their façade. Interactions in mythic form are considered a huge stepping-stone in a cross-species relationship, as it is a showing of their true selves, both physically and emotionally. The means of mythic courtship are as diverse as the creatures themselves, but for physiological reasons, breeding occurs in human form. Birthgiving, however, is conducted in mythic form, and creatures are born in their mythic form. Offspring are not crossbreeds, but are of one of the parent species, split evenly. Mythic youth learn to walk, speak, and take on a human form within weeks, but from early childhood, they age at a relatively human rate until they reach adulthood. However, romances with humans are considered taboo. Not only would a creature have to watch their beloved wither away and die without them, but they risk exposing the entire network of hidden creatures to the world.
Mythic creatures do not flaunt their abilities or use them to gain advantage over humans. It is a point of pride to beat humans at their own games. Negotiate without hypnosis, conquer without firebreath, charm without… well… charming. Thus, when in human form, creatures do their best to maintain a human façade. However, when there are no humans around, if one is among those they can trust… sometimes it’s fun to drop the ruse.