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Vivio (ヴィヴィオ)Age: 6 (StrikerS), 10 (ViVid)
Intelligent device: Sacred Heart aka Cris
After found by Caro and Erio during their break, she was taken into Nanoha and Fate's care. Her most visible feature is heterochromia. Quattro has referred to her as the "Vessel of the Saints."