Whisper-Nixes

 Whisper-Nixes are small and unassuming. Their cheeky-grins and flittering, glittering wings (which only some of them have the wings, in fairness) are disarming if you have as much social awareness as they do, which is to say not very much. They giggle at you, never with you, and just kind of... hover about you, just out of reach; hiding behind corners and roots, following at a distance. They are small, only a few inches tall, and bedecked in fine, golden filigree clothing; its really quite beautiful.

The rest of them, is somewhat disconcerting though. They show too many teeth, and their fingers... well. Their fingers are as long the rest of their bodies, and have long hooked black nails on the end, like bony, knobbled fishing lines. These they insert into the back of your head, just under the bottom of your skull.

It will bleed horribly, but in all likelihood it won't cause any permanent harm or great pain to you. It will feel extraordinarily strange however, as the Whisper-Nix's fingers crawl up through your flesh and hook around your brain. The real pain comes when they tug out your memories as glistening golden strands of thread. The memories they steal can be of just about anything; they can steal your skills, your magics, your plans, your dreams. These they will take to sew together into clothes and homes for themselves in their tree-commune-fortresses.

The clothes they make and the homes they weave are essentially magical, as they impart to the wearer and the home aspects of the memory they represent. Memories of flight, falling, or of flying spells are sewn into their wings. Memories of great battles, or of particular combat maneuvers are sewn into blades. Memories of death are sewn into deadly poisons. Similarly, memories of child-hood homes are sewn into their houses, which then represent the remembered domicile, which the Nixes find absolutely hilarious by the way. They will tell you all about the things they have made that you can't remember, and cackle about it in flittering droves.

They might occasionally steal the memories of animals, but they're never as interesting as those of humans, so they prefer to leave them alone. These they take only out of desperation or necessity.

They are tricksters first and foremost. They have been known to infest a person and control them for days at a time, or perhaps take a commission from an arrogant mortal for a memory-glove that confers the ability to throw flames, then change their minds half-way through and blast the commissioner with said glove, whichever they find funnier at the time. Their plans will change at the drop of a hat, if they loose interest or find an opportunity for greater comedy.

The golden threads of memory can be reincorporated back into their original owner (or anyone else for that matter) by swallowing it all down. The thread will remain lustrous and gilded as long as its owner would have remembered it, and fade and disappear when it would have been forgotten.