Ceridwen was first mentioned in 269 BCE, although it stands to reason, that she is older then that. The document mentioning her
Nia is Ceridwen's old pupil, both as a swordswoman and as a
Llwyd and Ceridwen share a weird relationship, mostly made weird by the fact, that the two of them had been in an on-off-relationship for many centuries, made weirder by the fact, that the two of them fought in many battles - against each other.
Branwen, Llwyd's daughter, has already promised to write a novel about their exploits and battles, something, which both Ceridwen and Llwyd fear quite officially.