Teishamirrik

Mirrik (ram horns) is male. Teisha isn't.

Neither of them put much care towards social norms beyond that which would get them kicked out of the clan they're currently in if they ignore them - and sometimes they don't even care about that. They tend to play it as an act, making people think of them as a goodhearted fool, there to be pitied and provide amusement and little else. They may be an aberration, but surely someone willing to do something that stupid and pointless can't be a threat, right?

That assumption is far from correct.

Teishamirrik's foolishness, naivety, and apparent lack of a self-preservation instinct is, in fact, a carefully calculated ruse. The main benefit is the fact that they can get away with ignoring a fair portion of the social rules common to dragon societies and any strange behavior from them isn't questioned too much, but they're also quite pleased about the fact that most tend to underestimate them and their combat abilities. When dragons go missing, Teishamirrik is all so rarely considered as a possible culprit.

TL;DR: They're faking being a himbo in order to get away with murder.