Who is Jacqueline Coutier from The Neutronium Alchemist Conflict and what is their importance?

Jacqueline Coutier is a possessor held by the Confederation Navy. She demands a trial, stating that she has rights that should be upheld. At the trial she attacks the courtroom and possesses more people, before realizing that passing on information about the ambush to Capone is more important than her own freedom.