Excella is of the well-respected Gionne family, known throughout Europe for their lucrative export-import business. She tends to be condescendingly proud around those she meets due to her aristocratic childhood and model-like beauty. Excella breezed through school due to her high intellect and business insight she had gained from her father. At an extremely young age, Excella had enrolled at a university where she majored in genetic engineering. Her grandmother is of the Travis Family, the founders of Tricell, which expands Excella's already well-regarded heritage.
Through scans from Famitsu, Excella was confirmed to star in the Mercenaries Reunion minigame apart of the GOLD edition of Resident Evil 5.