Seren is the goddess of the elves and the divine aspect of light energy - Zaros' opposing counterpart. It is said she inspired the elves to build their city, Prifddinas, the way they did so they could communicate, protect themselves and prosper. She is also the original provider of crystal weaponry. More information is provided on her and the history of this great crystal city in one of the books of Prifddinas' history found in the bookshelves of Lletya. She is apparently present within all elf crystal.
There is one known altar to Seren found in the elven town of Lletya. It resembles the altars of Saradomin, but made of wood with no symbol in the place where it normally would be.