Danielle Foccart is young sister of Jacques Foccart, not much is known about her past.
Danielle Foccart was created by Paul Levitz and Keith Giffen
Original Continuity: New Earth
In the latter half of the 30th Century, Brainiac 5 undertook a project to build the ultimate computer. He named the artificial intelligence that emerged Computo, and then watched helplessly as Computo ruthlessly set out to create a tyranny of computers on Earth. With the assistance of other members of the Legion of Super Heroes, Brainiac 5 defeated Computo, but not before the machine had destroyed one of Luornu Durgo's three bodies, changing her from Triplicate Girl to Duo Damsel.
Restored to inanimate life years later when Brainiac 5 accidentally incorporated a similar circuitry in a device he had built to save the life of Danielle Foccart, Computo invaded LSH headquarters and nearly killed the entire team. He sealed away Brianiac 5 and the Foccart's in hopes of seeking revenge on his creator. He had possessed the body and mind of Danille but was quickly burning its host body, who could not long survive the interface.
After the events of Zero Hour, a new timeline was created in which the Legion existed on Earth-247. In this timeline, Danielle doesn't having any superpowers.
Retroboot: New Earth
She was seen during the Legion of Three Worlds event, battling the Time Trapper and Superboy Prime.
Legion of Super Heroes (2019-present series)
Although not stated to be Danielle Foccart, a version of Computo appears in the fourth issue. Computo describes itself as "a mixture of technology and category nine humanoid biology". Computo helps Jon Kent experience the origin of the Legion.
Major Story Arcs
Original Continuity: New Earth
Only the decision of Jacques Foccart, the girl's elder brother, who was able to use telepathic earplugs along with Brianiac 5 to construct a plan. Jacques than used trickery to ingest Lyle Norg's, the deceased Invisible Kid, serum and turned invisible instantly. Once he had assume the powers and role of Invisible Kid he enabled Brainiac 5 to defeat Computo again.
Five Years Later
As for Danielle Foccart , her story did not end there. Danielle had been forever affected at the very biological core of her being, Computo's interface added Nano technology to her to her DNA. Danielle could now literally interface herself with almost any form of technology but would be strained and fatigued the longer she used this ability. Growing up now from the little girl who had been violated by Computo into a strong young woman
Her techno-pathic powers and her brothers former tenure at the Legion allowed Danielle membership to the newly reformed Legion. While on board the team she quickly rose to deputy leader, proving her attuned strategies and durable character on the field. She also often assisted Brianiac 5 on his scientific ventures. During the Event known as Zero Hour, Danielle and everyone else in her timeline were erased.
Powers and Abilities
Danielle has the ability to communicate with and control computers of all kinds by psionically interfacing with them.