Chiku can be free in night 8 too,this gives us the possibility to reach 250/1000 in A.I and find the deleted video in night 5.And also,if u tell Fexa to wait in the pizzaria,Lexy won't show up,if u tell her to wait in the VIP booth,Lexy will show up and do what she did in night 5 in another path(not invite Zero and unlock Lexy).The difference is that we can't do anything about her now.
Fun fact,according to Lexy,she appears every night but we can't remember her because of the "forgotten spell" which Smith put upon her.And it's true because in night 3,if u go to the bar as the last mission,u will find Fexa at the bar,and she said "I DON'T HAVE ANY MEMORIES OF THE PAST HOUR".The same thing happen to us in night 7 after Lexy leave.And Lexy said in night 7 that she is Fexa's "pirate companion".So we have 3 special girls : Lexy who is "designed to be alluring", Zero who is "the first be made" , and Marie who is "warded like the server room" .And "Missing person" didn't tell us anything about these 3 animatronics