I'll go with lore
Probably the most darkest in my lair is Quarta, who has some very questionable morals and she sometimes goes all doctor Frankenstein on living and non-living creatures
Gloomlord is a just a mysterious angstball, he is a pretty typical shojo anime villain to be honest lmao
This nameless skydancer and her twin brother are both dark and ominous, because they aren't really dragons, they are more like the sad shade touched creatures you battle in the coliseum. Since their behaviour hits the uncanny valley really fast, they always use a proxy for communication
Usually the unaware proxy is this dragon
Senpai is pretty much a supervillain, I think my lair has like 4 dragons who are infatuated with him by now, no idea how he does that, that's pretty mysterious
TorrentialAngst is so mysterious I honestly don't even truly know who he is and what he does
Rva is another mysterious dragon, he has agendas and he does not vocalise them, he is just playing chess alone in the dark while everyone else are still playing checkers
Accident and her accidental companion Deliberate are time-travellers of a sort, so you know they must be mysterious. They don't have the same origin though, Accident comes first from the correct timeline and causes Deliberate to appear from the alternate one.
Doomsday and Neetgod are apparitions and again, not really dragons, in a sense they do not exist, so again, mysterious.
Victorious is a vampire, so he gets to be in this thread too, he is pretty much the definition of dark and mysterious.
Since he shares his aesthetics with a vampire fangirl (who lorewise isn't dark and mysterious at all) I'll put her here too. Meet Dotzena, the casual ruiner of book-clubs.
Mossmuffin is a quiet wallflower, she keeps to herself, not much is known about her, dragons in my lair don't even know that she is so starved for knowledge that she will pretty much bring forth the localised apocalypse of the lair. She is the sole reason why time-travellers even exist in this lair. She will pretty much annihilate the 4th wall and glitch the lair out of existence.
