Leoni Hilli is an Alkemi from Novyi Zem. She is a member of the Second Army, and serves with Adrik Zhabin and Nina Zenik in Fjerda. She later becomes the representative for the Materialki in the Grisha Triumvirate.
When Leoni was a child, she accidentally ingested contaminated water. Leoni is a happy and bubbly girl, described as “walking sunshine” by Nina, which contrasts with Adrik's sullen attitude
Leoni has dark brown skin, long black hair which she wears in twists, and brown eyes.