LeeHi has a voice that is rare among Korean singers and particularly well-suited for R&B and soul. With a strong lower register, she possesses an attractive tone and a great sense of rhythm. Compared to many established singers known for their powerful high notes, her strength lies in the lower range. After receiving training, her vocal range expanded, allowing her to reach higher notes as well.

More specifically, she is a vocalist with a husky voice, excellent timing, and a strong ability to interpret songs. However, due to not having an extended active period and experiencing a long hiatus, many people felt it was unfortunate that her talent did not fully shine.

In live performances, she often showcases excellent vocalization, breath control, a captivating tone, and impressive dynamics. She uses a singing style that suits her voice well, with distinctive huskiness in her pronunciation and breathing techniques.

Her vocal tone is quite similar to that of Canadian R&B singer-songwriter Alessia Cara. She was also praised by Lorde, a New Zealand singer of the same age who has achieved a Billboard No. 1.

She has a strong affinity for retro soul. Representative songs include “1,2,3,4,” “It’s Over,” and “Hold My Hand” , and a large portion of her album tracks are in the soul genre.

After joining AOMG, she received positive reviews for collaborations such as “ONLY,” “HOLO,” and “H.S.K.T.” with Ahn Shin-ae of the Barbarettes. Her collaborations with Code Kunst—such as “X,” “XI,” “O,” and “Safety Zone” —are often praised for bringing out her unique soulful style, earning her love not only from her fans (mainstream music market) but also from listeners of underground music.

Based on her rare vocal tone, she received high praise from critic Kim Go-geum-pyeong, a professional judge on the audition program K-pop Star. Many other experts have also acknowledged the uniqueness of her voice. In particular, Yang Hyun-suk once praised her by saying that every time she sings, it feels as if “someone divine descends.