Eirlys Crwys is the equivalent of a Tool leprechaun for the herb and bush patches in the Crwys Clan district of Prifddinas. She is one of the elven tool storers in the game, who are not leprechauns. She is a member of the Crwys Clan, who have a special affinity with nature. She is accompanied by Briallen who only attends the bush patch, not the herb patch.
- Eirlys is a Welsh name meaning snowdrops.