Kalmia is a young woman with yellow eyes, dark skin, and long pink hair in twin braids with bangs framing her face. She wears a small green scholar's hat and glasses, a long short-sleeved shirt that exposes her stomach, a black tube top underneath, and a long green skirt with a banner, and white shoes. She wears a pendant with a purple gem and a black choker.
In her first appearance, she wears a black dress with a white coat with black details and long white stocking with black shoes. Her bangs are straight.
Kalmia is a caring person and serves as a sisterly figure for the group. She is a dedicated doctor and is resolute in putting the interests of the people first and saving as many as possible. Contrasting with her otherwise mature demeanor, she is rather irresponsible, laidback and messy person, unable to do normal chores properly. She is not only a terrible cook, but also so disorderly her clothes regularly end up in the hallway of the Farplane Express, something she typically laughs at.
Kalmia is fought in the main story on the Hill of Coiled Plants.
Kalmia is voiced by Sawako Hata in her CG Limit Burst.