(Covers information from Anderson's universe)
"J Pop Girl" was a clone engineered by the automated Umbrella Prime facility for T-virus testing scenarios.
During Alice's escape from the interrogation room in Umbrella Prime, she entered the Tokyo simulation created to monitor the spread the t-Virus among the human populace. Once the simulation began, J Pop Girl stepped into the street with the crowd, already showing signs of infection. She bumped into Alice before stopping in the middle of the intersection. Attacking a businessman, in repeat of the actual J Pop Girl's last acts, several other undead emerged and attacked the surrounding populace, causing a panic.
When Alice fled into a narrow white corridor, J Pop Girl and several other Undead followed her. Alice quickly flung J Pop Girl into a wall and shot her twice in the chest, briefly stunning her. After Alice killed the other Undead, J Pop Girl rose again and started for Alice, sporting the tentacles of a Majini Undead. Alice shot J Pop Girl through the head before she could reach Alice, killing her.