Among the victims were two women who were killed when a drone struck a van carrying five farm workers near the village of Shchegolek, authorities said.
The port city in annexed Crimea last held a Victory Day parade in 2022, shortly after Russia’s full-scale invasion of Ukraine.
Russia has offered to mediate the crisis, with Foreign Minister Sergei Lavrov having held calls with both sides last week.
Barabash, who faces up to 10 years in prison for spreading “false information” about the army, said she plans to request political asylum.
The soldier, Dmitry Stenkin, allegedly broke into the home of Olesya Larina in the Kursk region last Tuesday and fatally attacked her.
Around 20 people came to the courthouse to show their support for Nadezhda Buyanova, whose appeal hearing was held behind closed doors.
The parade came a week after Moscow and Pyongyang confirmed that North Korean troops were deployed to the Kursk region.
City authorities said the cause of the blast was still unknown, while police launched a criminal investigation into the incident.
Human rights lawyer Karinna Moskalenko discusses the international mechanisms still available to Russian citizens and her current work on Belarus.
President Vladimir Putin's office said the two presidents are expected to sign a series of agreements during the visit.