One of Alphard’s top lieutenants who affectionately refers to Alphard as an elder sister, she was hinted to have been with Alphard ever since Alphard and Siam had gone their separate ways. She appears calm and even-tempered, but is in fact unwavering, merciless, and very much obsessed with admiring and idolizing Alphard to the point of being in love with her. To her frustration, however, Alphard does not reciprocate and instead ignores or even proceeds to ridicule her from time to time. Because Alphard seems to have taken a special interest in observing Canaan's reactions to every plot carried out by Snake, Liang Qi sees the elimination of Canaan as a way to win back Alphard's attention. Alphard later decides to leave Liang Qi to her own devices after the attack on the Shanghai International Conference Hall, leaving her very much mentally unbalanced as a result.

When Liang relocates to the Factory, a village turned research complex in Xinjiang, China where Snake (and, in the past, the CIA) conducted researches and human testing on Ua virus, Alphard plans to have it decommissioned/destroyed and have Liang killed along the way but temporarily changes her mind after Cummings displays genuine concern for Liang, a fact that she finds amusing. But Liang mockingly rejects Cummings' plea to return with him and then takes an untested experimental drug designed to artificially develop synesthesia, again in a bid to make Alphard pay attention to her. The side effects of the drug inflict great pain and give her grayish-blond hair and bloodshot eyes, making her slightly resemble Canaan, the very woman she hates and vows to kill, and driving her deeper into insanity. Cummings, who truly loves her, then fatally shoots her in order to put an end to all her sufferings. Thinking that Cummings has killed Canaan (who is in reality Liang's own mirror reflection), Liang dies in his arms, causing Alphard to conclude that love is a troublesome thing.