Debrii was introduced by the New Warriors' TV producer, Ashley, and so was the only member of Night Thrasher's revised team to have not been hand-picked by him. The TV company's board of directors felt that there was no "friction" in the current team - they all liked each other too much - and that the show would get better ratings if an unknown quantity was added to the team. Debrii's abrasive, antagonistic personality was perfect in this regard; she didn't get on well with any of the team members, frequently making snide comments about Microbe's relatively-useless powers, and constantly arguing with Namorita.
Debrii was one of the former Warriors who felt the sting of the growing anti-New-Warriors movement when her secret identity was "outed" online through a New Warriors hate site, after which her car was overturned and set on fire.
Debrii is described as a "low level telekinetic magnet". She is able to move masses of small objects at will, and is capable of manipulating many such objects at one time. She can use any "debris" around her to defend herself from attacks, or to attack her enemies. During the New Warriors' battle with the Mad Thinker's Intellectual Robots, she took control of a pile of scrap metal, crafting a shell in the form of a large monster around her body, and manipulating this creation as a weapon. She can also levitate a little.