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- Chief Lee – the wise elder of Lahan Village. He was the man to whom Wiseman, otherwise known as Kahn Wong brought his son Fei to three years ago. Lee took Fei in, helped him recover and raised him like he was his own son. He would have liked it if Fei could have married Alice, but since Fei was not from Lahan he was not permitted to marry anyone from Lahan because of a strict tradition. It is assumed that Chief Lee died when Id awoke within Fei again during the night of the Lahan incident because he does not appear again beyond that night.
- Alice – a young woman from Lahan village and the older sister of Dan. She is engaged to marry Timothy, another Lahan citizen and Fei's best friend. However, she harbors romantic feelings for Fei, and expresses some regret that if only he had come to Lahan sooner and thereby had the chance to forge a stronger relationship between the two of them, she might have married Fei instead. Tragically, she is killed in the Lahan village incident along with Timothy and a large portion of the town's population.
- Dan – a mischievous young boy who once lived in Lahan village. When his older sister, Alice, dies in the Lahan incident, he blames it on Fei. From that day forward, Dan becomes Fei's rival, challenging him at the Aveh tournament. Dan also has Alice's wedding dress, which he may give to Fei during the tournament. His motivation for Fei to have it is to constantly remind him of what he did to Alice, although it does have a positive use. Once the truth behind Fei's Id form is revealed, Dan forgives him.
- Lucca – a character who provides Fei with useful advice prior to the destruction of Lacan Village. She appears in Xenogears as an in-joke, as many of the people behind Xenogears were also involved in the production of the game Chrono Trigger, in which Lucca was a main character.
- Timothy – Fei's closest friend in Lahan village, Timothy was the fiancee of Alice, another childhood friend. However, when Gebler attacked Lahan, Timothy was killed. When this happened, Fei grew upset, and briefly morphed into Id.