Ries is calm and does things in her own way. She has an obsessive interest in food.
In S.1198, Ries lost her sister Rufina Argent when a jaeger corps attacked the Aster House orphanage both sisters helped out in. After the death of her sister, Ries followed her childhood friend Kevin Graham in pursuing a career among the Gralsritter. She was trained by Ein Selnate and has been serving as the assistant of Kevin since just before the Phantasma incident.
Ries's weapon of choice is a templar sword. She can make use of the following weapons: