FPE imposter

This is an incident about a bunch of imposter who sneak inside the school. They kill the original one replace them. Some of the imposter may have something inhuman feature, like unnatural appearance or behaviour. However, most of them are copied very detaile. One things they can't copy is memory, it's the only way to find them real or fake. Btw, new oc, Kiki Student: Abbie: (male, crybaby and scaredy cat. crush on Lana, dead, replaced by imposter) Lana: (female, joy and funny. crush on Abbie) Engel: (male, kind and helpful. friends with Claire) Claire: (female, kind and nice. friend with Engel) Bubble: (female, kind and nice) Oliver: (male, bully, jerk. friend with Zip and Edward) Zip: (female, bully, jerk. friend with Oliver and Edward) Edward: (male, bully, jerk. friend with Zip and Oliver, dead, replaced by imposter) Lizzy: (female, popular and friend with Petunia) Petunia: (female, popular and furry. friend will Lizzy) Ruby: (female, TV head robot, can detect imposter) Riley: (female, crazy and crush on Oliver, dead) Skell: (male, emo and cold) Venus: (female, athletic, loves snickers) Kiki: (female, cold, mysterious, always silent, chill, loves magic, has a prediction power, loves KitKat) Teacher: Miss Circle: (female, strict, math teacher, Love Oreo, kill the students who failed the test) Miss Bloomie: (female, strict, science teacher, kill the students who failed the test) Miss Thavel: (female, strict, language teacher, kill the students who failed the test, dead, replaced by imposter) Miss Sasha: (female, kind, nice, art teacher, doesn't kill the students who failed the test) Miss Emily: (female, kind, nice, history teacher, doesn't kill the students who failed the test) Mister Demi: (male, shy, timid, kind, nice, music teacher, doesn't kill the students who failed the test) Miss Grace: (female, strict but kind, principal, has the highest status, love coffee)