Zoe was a orphan in the chapter 9 city's orphanage, It was somewhere near the mall I guess, She grew up there with no memories of her bio parents, Before the infection..maybe..2 years? When she was 7. She got adopted by the piggy family, She wasn't really good at speaking due to the orphanage having little funds of education. So she was enrolled in George's classes (He's like 10 I think in piggy but Probs in special needs school) To learn to speak, A year later, she's okay at speaking. Saying sentences..ok I guess. But im sure you want it skipped to the infection right? Well..She was with george when it happened. (BtW I assume disorted memory is george's imagination soo) They end up escaping, George telling Zoe To go to the police station to report their family. She accidentally says her brother is missing..starting chapter 1.. When george sees zoe again, She..couldnt really talk..she was in thought..after seeing so much death she just blinked. And if your wondering where she got the crowbar..she found it in the courtyard in station, Her role in the main game is to be chosen by a player to carry around, She's like a attack npc. Her item to attack is..well any food, Sweets make her go the fastest, But using too many will make her start complaining about a stomach ache in a babyish way..cause..well that zoe, During outpost, George and her fight through many soilders to get to You, Zizzy and Pony, Knowing that your their only hope to get their family back, During plant. She speaks during the cutscenes..During the bad cutscene after badgey attacks you she says: '*Insert username here*..are..you..like..other mom and dad now?..infected?' And after george suggests a cure in good she says: 'So we can get mom and dad back?' But..true..She says..'But Its gonna take a loong time to get a cure..' If you wanna know more..just say in the comments please!