Ruolin is a Los Angeles-based documentary filmmaker and editor. Working primarily as a director and editor, she uses documentary as a way to explore the world, the communities around her, and her own place within them. Her work spans diverse subjects and stories, grounded in a deep interest in human experience, character, and emotion.

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Ruolin received her MFA in Film/Video from CalArts, where she directed narrative shorts inspired by everyday life and infused with dreamy and humorous elements. Her thesis film, String of Butterflies, a darkly humorous fantasy, is currently streaming on multiple platforms.

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She began her professional career in documentary as an assistant editor, working on award-winning films including Walk Run Cha-Cha (Oscar-nominated), Hidden Letters (Oscar-shortlisted), and Our Time Machine. The experience shaped her approach to editing and deepened her interest in character-driven storytelling and the complexities of real lives.