Queen Barb

Barb, also referred to by her full name of Barbara, is the queen of the Rock Trolls and Thrash's daughter. She first appeared as the main antagonist of Trolls World Tour. But by the end, she is reformed.

Personality
Queen Barb is shown to be a zealous hard rocker at heart, who loves the members of her Tribe and her music.Even though she mostly shields herself with a rough exterior, Barb actually has a softer side that she mostly expresses around the kids in her tribe and is seen rocking with one during Crazy Train, she calls deeply for her senile father, and her pet bat, Debbie who she calls her "hairy little baby". Barb appears to have a more realistic perspective of friendship and believes that one can't just become best friends all of a sudden, but rather friendship takes time with mutual care and respect. But judging by how the other Rock Trolls treated her (as their queen and leader and not as a fellow troll to befriend), it seemed that she was lonely and wanted real companionship.

Her more realistic approach to the world let her see how the Tribes were different, which was a stark contrast to Poppy who believed everyone was the same, but she didn't see how this was positive. Instead she saw the only way to unite the Trolls was under one music, which she believed should be her own music - rock. Her plans proved to be far more insidious, as she planned not only to eradicate all other kinds of music except for Rock, but to turn the other troll tribes into "Rock zombies", using the Rock String to overwrite the Trolls' true nature and force it to be dedicated to Rock. Although Barb thought her actions were righteous and for the greater good, she casually admitted her goal was basically world domination, and called it fun.

She had no qualms with threatening the other tribes, as seen in her confrontation with King Trollex, and appeared to look down upon the other tribes and their music (mocking the Techno trolls' music as bleeps and bloops and calling the Classical trolls' music boring because theirs doesn't include lyrics). She especially mocked the Pop trolls after going on a violent rant of how much she hated Pop music and appeared to loathe Pop the most out of all the other tribes. This is likely due to the ancient Pop trolls being responsible for the tribes living apart and isolated from each other. Barb didn't seem to realize, or perhaps she just didn't care, that her motives and her methods to destroy all the other tribes' music so that all are united under Rock is basically the same thing the ancient Pop trolls did, which made her a hypocrite, if not a worst villain due to converting Trolls to Rock zombies.

Barb displayed a twisted cruelty when she tossed the guitar holding the Strings to Rock zombified Poppy so she would be the one who converted King Peppy and the Funk Twins. It backfired on her, as Poppy had avoided the brainwashing of the Ultimate Power Chord.

Although she threw blame onto Poppy for destroying all music, Barb did show remorse after realizing that the ruining of all Music was ultimately her fault. Once she realized her mistake, she learned to accept other's company and their differences, and took her first step of making new friends by accepting Poppy's offer of friendship, therefore gradually becoming a happier person.