Jade West

Jade West is Tori's nemesis, a dark and prickly girl.

Characteristics
Even though she is kind of a mean girl, Jade gets props for her hard work (and her boyfriend, Beck) though she's more of the 'bad girl' than the mean one.

Based on TheSlap, she seems to have quite an obsession with Beck. This also started the rivalry with Tori when Tori tried to clean Beck´s shirt after she spilled coffee on it.

Jade mentions on TheSlap.com that she has "recurring dreams that I really can't tell you about", possibly showing her dark personality, or a sign that she's suffered abuse of some sort ( mental, emotional or physical ).

She writes that she hates spring because of the allergies (among other reasons), which might imply she suffers from mold or pollen allergies.

She also seems to have very subtle ways of revenge. She said in her profile video that if someone makes her mad "...I won´t get in a fight with you, but I´ll retaliate in a way that´ll make you sad for a LOOONG time." and in "Stage Fighting", a girl who accidently threw a cup of water at her fearfully exclaimed "Please don´t destroy me socially!"

In "The Birthweek Song", her macabre sense of humor was revealed when she described a scene where a monster gouged out a play´s character´s eyes as "really funny".

Her "mean girl" persona and jealousy of Tori may indicate that she harbors deep insecurities.

Tori
Jade appears to have a rivalry with Tori, but as of episode 3, Stage Fighting, they seem to be developing a friendship. In the next episode, however, she gives Tori coffee she found in the garbage and says "Yeah, she (Tori) is not really my friend." Despite saying this, Jade comes to Tori when she breaks up with Beck, and asks for her advice. ( See: Jori )

Cat
Despite their opposite personalities, Jade and Cat seem to be good friends. Each expresses concern for the other when they're hurt, and calls out the person who caused it. Jade is also less hostile towards Cat than towards most people, whereas Cat is not as easily offended by Jade. ( See: Cade )

Beck
Beck is Jade's boyfriend, whom she seems to obsess over. They have been dating since the beginning of the series. She dumps Beck in the episode Jade Dumps Beck, but has second thoughts about it, and wants him back. (See: Bade)