This is Yulia Tymoshenko, Ukraine's former Prime Minister and the leader of the country's largest opposition party (the "Fatherland" party, shown in pink in the above map).

In 2011, she faced a politically-charged trial and has been imprisoned since.

The European Commission, the EU's executive body, specifically cited the need for Yulia Tymoshenko's release as a precondition for closer Ukraine-EU relations:

"Signing and ratifying the Association Agreement and the DCFTA will not be possible unless Ukraine urgently addresses this stark deterioration of democracy and the rule of law. In the immediate term, this applies to the above cases of selective justice and politically motivated prosecution. Solutions need to be found, enabling Ms. [former Prime Minister Yulia] Tymoshenko, Mr. [former Interior Minister Yuriy] Lutsenko and others to regain their freedom and fully participate in political life."