Ylva is a charming Banette who shows kindness towards everyone, and yet, is the one responsible for tracking around social rumours spread around the campus. She might look very young but in actual, she is aged twice than she looks. Even when her age doesn't reflect her facade of a young Banette, she can keep up to par with fashion and technology.
Outside of schoolwork, she can been seen around a café taking her merry time relaxing, doing small parts of her job and listening to rumours. She bears an accent that a mix of a Yorkshire and Irish accent and sometimes speaks in Yooper English.
At a young age, Ylva was severerly injured from war. Due to this distressing experience, Ylva learn the war's cause and the events around it, leading her to pursue a journey of studying different histories across the world.