Chronic Hero Syndrome: Stops to help everyone he comes across and is adamant about never sacrificing anyone's life for any reason. The women he travels with tend to get pretty snarky about this.
Kahlan: Well, if you're going to rescue every damsel in distress along the way, then there's no time to waste! Nicci: Do you always stop along your quest to help people? No wonder you haven't found the Stone of Tears, yet. Cara: Who would have ever dreamed that the Seeker could go twelve days without stopping to save helpless children from distressed farm animals!
Nice Job Breaking It, Hero: By defeating Darken Rahl, he unintentionally tears the veil and allows the Keeper to begin his war on the living. As Zedd says, the worst harm can come from the best intentions.
Refused The Call: Until his father was killed. And again when he was told that he is the rightful Lord Rahl.
Unresolved Sexual Tension: With Kahlan at first; her powers meant that if they were to consummate their feelings, it would destroy who he is. Although they did have sex once when she was magically split apart and thus her powers didn't work. In the last episode it turns out they've gotten around this by The Power of Love, as seen above.
Adaptation Explanation Extrication: In the books, she wore white because she was already the Mother Confessor, and only the MC wears white. Here, she doesn't become the Mother Confessor until the episode Sacrifice, yet she still wears the white dress of the Mother Confessor before hand.
Last Of Her Kind: Goes back and forth. Unlike in the books, she starts as one of many Confessors; then later on, they're all wiped out, leaving her the last. Thenher sister is brought Back from the Dead, so she's no longer the only one.
Wizard of the First Order. He fled the Midlands years before, bringing the infant Richard with him. He serves as Richard's mentor, and his mind is more than a match for his Wizard's Fire in getting the job done.
The Smart Guy: As First Wizard, he has in-depth knowledge of most every bit of magic the group comes across.
The Trickster: Utterly owns Darken Rahl in "Puppeteer" through his wits and tricks alone, without having to cast a single attack spell.
The Worf Effect: In Perdition, Nicci easily deflects his magic, overpowers him, and knocks him down, demonstrating her status as the most powerful of all sorceresses. Though he does recover in time to help Richard defeat her.
Darken Rahl (Craig Parker)
Master of D'Hara. The Big Bad of the first season, he had heard of the prophecy of the Seeker, and sought to kill him when he was an infant. When he finds out Richard is alive, he stops at nothing to have him killed or pressed into his service.
Beauty Is Never Tarnished: Averted, once again. She gets beaten up pretty badly when the Mord-Sith turn on her in the season 2 opener, and is covered with cuts and nasty bruises when she's captured by Darken Rahl.
Composite Character: She borrows traits and roles of Richard's three main Mord-Sith bodyguards from the books, Raina, Berdine, and Cara. Like Raina and Berdine, she seems to have had a same-sex relationship with a fellow Mord-Sith, she serves as an advisor for Richard like Berdine did, shares a Pet the Dog scene involving a chipmunk like Raina, and naturally enough shares Cara's name and her role as his longest lasting bodyguard.
Cynicism Catalyst: Kahlan mentioned several times in the first season that the reason why she was so dedicated to finding the Seeker and stopping Darken Rahl was because Dennee had died trying to do it.
Mama Bear: Enough to prompt her turning against the Mother Confessor.
Offing the Offspring: Mother Confessor Serena wanted her to, after she gave birth to a male child. She, Richard, and Kahlan went to great lengths to avoid this. Though tragically, she was forced to kill the child after all, when Rahl's Mord'Sith attacked them in hopes of gaining control of a male Confessor.
The Witch Woman. Sometimes Ally of the Seeker and his friends, she has the gift of prophecy, and works to make sure the terrible result of her visions don't come true. This often puts her at odds with Richard and the others.
Even Bad Men Love Their Mamas: Subverted. He did at first, but when Kahlan realized that he was corrupted and was going down the path of evil, she tried to kill him. She failed, and afterwards Nicholas killed her himself.
A Sister of the Dark totally devoted to the Keeper and his cause to destroy all life. She is convinced that the Keeper cannot win while Kahlan is alive, and devotes her efforts to killing her. Later, Nicci renounces the Keeper as well as the Sisters of both the Light and the Dark and becomes a neutral party.
Adaptation Dye-Job: Played straight in "Dark", subverted in "Princess" when she possesses a new body, which is blond, like her book incarnation.
Amoral Nihilist: She believes the world is "like a lame horse" and that trying to do good will only prolong the suffering of existence, and everything would be better off if the world was "put out of its misery." After her defection, she reconsiders a few things and becomes an ‹bermensch determined to destroy humanity and remake it in her own image, creating a new world more suited to her desires.
Character Exaggeration: In the books, Nicci noted two things in passing: that she considered the world to be a wretched, senseless existence that had no purpose except for torment, and that she hated it when men "assumed they had a right to her body." These two traits seem to have become the basis of her character, here.
Cliff Hanger: At the end of the series, Nicci narrowly manages to come Back from the Dead for a second time, but is now at the mercy of Darken Rahl and his Mord'Sith, who are using a Rada'Han to suppress her powers.
Composite Character: Her character and role is a combination of three distinct Sisters of the Dark from the books: Liliana, a power-hungry Han-stealing sorceress who pretended to be Richard's friend at the Palace of the Prophets and tried to take his magic; Ulicia, the most powerful of the Sisters of the Dark who served as their leader and primary schemer, and plotted to capture Kahlan; and most strongly, Nicci, a sympathetic Sister with a Dark and Troubled Past who used a Maternity Spell on Kahlan, and was eventually convinced by Richard to leave the side of evil.