Mari Necrona is Luca Fern's girlfriend. She's a bubbly, energetic girl who hides a serious and incredibly intelligent side. She's often cleaning up after Luca and getting him out of trouble. She plays the bass in Luca's band, and she has formed an Umbra Link with the Umbra, Bloody Mary. Mari is 20 years old. She has a cheery, slightly higher pitched voice, but when she's serious it drops to being slightly sultry in tone.