This is Mina Beff, evil Trina's troll, of Grojband captured as a Princess Purloined. In the episode "Knight to Remember" a comet comes and causes all sort of alternating reality, such as docile Mina and bossy Trina switch roles. She even had the members of Grojband to death, until an evil knight https://www.youtube.com/watch?v=dHQHV91QCMo shows up. Mina even has the trademark Diary Modes https://www.youtube.com/watch?v=DK8Zr8zo6Ss and helps Groj Band write a song.

Bernadette (Mina) Beff is Trina's best friend and lackey. Despite wanting to express her own opinion, she wishes to be as cool as Trina and does whatever she asks her to, no matter if she pushes herself too far, or gets injured. She is voiced by Denise Oliver.

Mina is a sweet, nerdy girl who is very nice and loyal to her friends. She gave herself the purpose to be the best friend forever to all of her friends ad she is very committed to fulfilling this duty. Her last name "Beff" is similar to the term "BFF" which is one of the main reasons why she does this. However, Mina's best friend is Trina Riffin. Trina is very rude and abusive to Mina and treats her like a slave, making her a very bad friend for Mina. However, Mina still loves Trina very much and she is highly tolerant of Trina's cruelty. No matter how ridiculously horrible Trina acts toward her, she is always shown to effortlessly keep a happy attitude without any struggle or hesitation whatsoever. Although Mina is always getting stepped on by the bossy and self centered Trina, she enjoys the "rub-off" popularity she gets for being by the side of the girl that she sees as a glamorous and beloved plastic despite the fact that Trina is not popular at all because of how everybody knows how horrible Trina really is. In the episode "Space Jammin'," it was revealed the Carrie is Mina's little sister and she has a cat called Dr Purr. Although it has never been seen much in the show, this means that they must have a strong relationship with each other. Not much is known about Mina's early life since it hasn't been seen in the show before. However, on some occasions in the show, she will mention what her life was like long ago. It has been confirmed that Mina's name was originally Bernadette. This was until Trina became friends with her and she forced Bernadette to legally change her name to Mina just so that their names would rhyme.