A wide variety of individual mythical creatures come under the umbrella of sleih beggey, with both benevolent and malevolent fairies.
[4][5] Generally, the Sleih Beggey are seen as stocky in stature, and as domestic fairies, who lived in burghs.
[3] The Ferrish have been described as a particular tribe of fairies, standing between one and three foot tall, who rode horses and kept dogs for hunting, having no named king or queen.
They were known to replace human babies with changelings, as with many other fairies in the British Isles and Ireland.
[1][4][6] In the manga and anime, The Ancient Magus' Bride the Sleigh Beggy are a special type of mage.