Zaria

Zaria is a sorcress in the Pits of Carnage with a very high opinion of herself.

When talking to Krilner and Zogith in Ultima Underworld II, the Avatar learned that Zaria was the number two in the food chain in the pits, second only to Dorstag. Since Dorstag denied the Avatar a duel to win the Blackrock Gem, feeling him/her not worth his time, Zaria seemed the logical choice to gain his respect.

Talking with her, it became clear real fast that she had a very high opinion of herself. She also made it clear that only she (in her mind) was allowed to defeat Dorstag in the future. She also tried to lure the Avatar into a duel so that she could chose the Arena of Air to have a huge advantage. However, the Avatar was too smart and implied that woman couldn't fight anyway (a little odd when the Avatar is female) which enraged Zaria so much, that she demanded a duel, giving the choice of arena to the Avatar.

In the following duel, she perished, and Dorstag felt that the Avatar was worthy of dueling him.

It is also possible to let Zaria live by defeating Dorstag earlier. After that Zaria is willing to challenge Avatar for the title of numnber one. However, Avatar can decline, telling her she's free to rule in his/her stead.