Rain Qin is Hana Tsu-Vachel's partner in select missions that require someone with advanced technical knowledge. Having no memory of her past, she is a rather mysterious individual. Rain has a strong bond with Hana and will do whatever it takes to protect her.
"During a routine visit to her parents' memorial at Jing Sum Temple, Hana stumbled across Rain lying unconscious in the back garden beneath a mural of the Eight Immortals. For some reason, Hana felt compelled to help. She brought Rain home and nursed her back to health. A week later, Rain regained consciousness but could remember nothing of her past. Hana offered Rain shelter until she could be on her own again. Within a short time, Hana noticed the exceptional intelligence that Rain possessed. It became clear to Hana that Rain was a genius in various technical and academic disciplines. In time, the two became partners, and more..."
—Fear Effect 2: Retro Helix - Prima's Official Strategy Guide