This self-fertile sweet cherry is a 2018 introduction from the Zaiger breeding program. Royal Sonia has medium to large size, firm flesh, and an attractive red skin color; the fruit is especially flavorful, with a good balance of acid and sugar. Crops have been consistently good for nine consecutive years in the Zaiger orchards. This variety stores and ships well. Harvest is mid May in Central CA, about a week later than Royal Hazel. Estimated chilling requirement 650 hours. Self-fruitful. U.S. Plant Pat. No. 29090