She aims to critically assess the EU's claim for digital sovereignty through, among others, norm-setting and investment in quantum technology applications, taking into account its impact externally, vis-à-vis third countries, and internally, vis-à-vis EU citizens. In conceptualising what sovereignty entails in the digital realm and questioning its invocation by the EU and others, Plixavra will apply EU and international law and incorporate critical legal theory perspectives, including feminist accounts.

Plixavra holds a PhD from the KU Leuven Centre for IT & IP Law (CiTiP), where she remains an affiliated researcher. Her dissertation questions the lawful establishment of mass data surveillance for predictive policing frameworks, such as the PNR, ECS and AML data retention and transfer schemes, in light of the EU's powers to provide security whilst safeguarding fundamental rights, particularly privacy, data protection, effective remedy, fair trial and presumption of innocence. At CiTiP, she further worked on national and European projects, researching how emerging technologies developed and deployed in the field of security interfere with privacy and data protection rights. Plixavra is also a certified lawyer in Greece and holds an LLM in Intellectual Property and ICT law from the KU Leuven Faculty of Law and an LLM in International Studies from the Aristotle University of Thessaloniki Faculty of Law.