Kyllikki, commonly called Kylli, appears to be a petite, young woman of northern heritage. Standing only 5'2" tall and weighing in under a hundred pounds, she certainly does not cut an imposing figure. However, she possesses a beauty it is hard to put one's finger on, something somewhat otherworldly. She usually has a warm smile on her smooth, round face. Her inviting eyes appear odd when examined closely, though, as their green-hazel-gray reveals a pattern, as though looking down from atop a tree and seeing its branches and leaves; and the pattern varies with the seasons. Her straight, dirty blonde hair falls gently to around her waist. It's a little hard to place a specific age on her, as her size makes her appear younger, while she seems to have some years of experience about her; usually people would gauge her to be around her early to mid twenties.

When interacting with people they pick up most on Kylli being focused, kind, and a bit odd. When she gets going on a task, she tends to become somewhat single-minded; with personal goals this can become a strong drive. She is warm and friendly toward people in general, and she seems empathetic. She seems particularly careful about the wording of bargains, perhaps as a remnant of her time among the Fae. Other things she may have picked up from among the Fae are things like a lack of Christian habits, an openness to women in different roles, an indifference to modesty in dress and behavior. Overall these make her likable but unusual.

Kylli speaks a surprising number of languages well, generally with a slight Finnish accent. But when she sings she is able to lose her accent entirely.

Kylli tends to dress rather ordinarily, with peasant garb and a scarf over her head. She might wear something more formal if it suits the occasion, and she will tend to go all out and play it up. She just doesn't generally bother, seeming to fit into the apparent servant role more readily. The thing that does stand out about her items is that she tends to carry her kantele, a stringed instrument with a sound box carved out from a single block of wood, with her.