Acto Viri was a 24th century Bajoran artist from Wyntara Mas Province on Bajor.
She painted a picture called Bajor at Peace which she displayed in an arts festival on Deep Space 9 in 2376. The painting caught they eye of station commander, Colonel Kira Nerys, who bought it and hung it in her office. (DS9 - Mission Gamma novel: Twilight)
In 2385, Acto designed the Memorial Deck on the second Deep Space 9 station that honored those who died in the destruction of the original Deep Space 9. (ST - The Fall novel: Revelation and Dust)