Chtholly Nota Seniorious

A leprechaun. Her race is also one of those called Mark-less.

Was the oldest fairy, and also the strongest wielding the sword of the Regal Braves, Seniolis.

As she uses her venom, her hair starts changing to red and she starts losing her memory.

Deceased in battle. For those wanting to pickup the Light Novels, it is Volume 3, Chapter 4 Part 5.

As can be seem by Ithea's history, the leprechauns are loop-reincarnating which means it will probably happen to Chtholly also.

There have been multiple theories about who the new-born blue haired girl was at the end. It has not been confirmed if it is actually the reincarnation of Chtholly but, note of Ithea's history. It remains a deep void in the anime/LN as of right now and is causing controversy. It has also been said that the new-born was a flash-back to Chtholly's Birth.