Lord Oberon can seem arrogant and cruel at times, so it must be pondered just how bad his young wife, the Lady Titania must have been for Oberon to levy and enforce a thousand-year banishment from Avalon upon her and every other member of their race in order to make her "grow up".
Nevertheless the punishment seems to have worked, and Titania as she appears on the show is far more mature than her old self, appearing especially serene and mature when compared to her arrogant and short-tempered husband. Oberon certainly seems to appreciate the change when they are reunited in the episode "Ill Met By Moonlight", and the two remarry. Titania is depicted as a skilled (though oddly utilitarian) manipulator, possessing near total control over Oberon himself to the point where she can influence him to do whatever she desires. She also expressed a keen interest in "the human magic known as science" over her centuries of exile, learning much of the human sciences. "Anastasia Renard", one of her personae, gained quite a reputation as a scientist in fields such as nano-technology and biology.
During her time on Earth, Titania posed as a number of mortal women. Most recently, she posed as Anastasia Renard, the ex-wife of Halcyon Renard and mother of Fox. It is through her union with Halcyon that Fox's son Alexander (and, to a lesser extent, Fox herself) came to possess limited magic powers. She tried to take Alexander back to Avalon with her with the help of Oberon, but was thwarted. Though, it seems that her failure in doing so was seemingly her idea from the beginning.
She was the only member of the third race to appear in the non-canonical season 3 The Goliath Chronicles. In the episode For It May Come True, she had used the same reality manipulation powers similar to Puck's attempts in the episode Future Tense to create an alternate future in order to manipulate Goliath.
Titania was voiced by Kate Mulgrew.
Read more about this topic: Oberon's Children