Strangely, Tuon is pretty much the only Seanchan character I don't like. I wish Galgan had been the Emperor, it would have been so much better.

Tuon has been undesirable to me from the beginning of the series. She's everything that's rotten about a royal lineage with the strictest cultural boundaries.

After reading what other posters have written, I'm surprised we're reading the same series. She's completely inflexible and only believes things once she is literally overwhelmed with evidence. She only conceded to herself that Mat was perhaps more than a brigand in TGS when Rand and Nynaeve both told her that he's a good man. Mat is going to rue every day he's married to her. Her handling of channeling has been anything but flexible - she still intends to leash everyone and she attacked the Tower.

She's the biggest threat to the Light and has undermined them more than the Shadow has. She's very lucky Rand didn't destroy them, which he had every right to, though I think Egwene is going to take a nasty bite out of her.