Answer
The Finnish president who pardoned Risto Ryti, the prime minister of Finland during World War II, was Juho Kusti Paasikivi. Paasikivi granted Ryti a pardon in 1949, after he had served a 10-year prison sentence for war crimes committed during the Continuation War. The pardon was controversial at the time, but it was seen as a necessary step in the process of reconciliation and healing the wounds of war.