*Note: Though canon confirms that she was persecuted in her old hometown for her Mystic Eyes and then "losing" said power around the age of six, the exact specifics of what happened up until she moved out are more or less headcanon
(Age 4) Townspeople ganging up on her after she had used her Mystic Eyes of Distortion to pick some flowers in an unconventional way
(Age 8, 3rd grade) Being chosen as the "seeker" for a hide-and-seek game at a recently abandoned shrine with some of her classmates, not realizing she's being left behind on purpose.
(Age 9, 4th grade) Having classroom cleaning duties being foisted upon her after school
(Ages 8-12) Walking home from school and getting shunned by people along the way
(Age 12) Attending the funeral of her biological father, followed up with a proper meeting of her step-father
Cafe Scene, where Shiki notices something strange about her
Darker Memories (spoilers ahead)
Fujino being sexually assaulted, despite her telling them in an apathetic tone to stop
Fujino getting punched hard.
Being hit in the back with a bat and having her spine broken, temporarily unlocking her sense of pain
Activating her Mystic Eyes to instantly twist off the gang leader's head before she was about to be stabbed. Immediately after, she rips apart the rest of the gang, save for one who ran away
Luring one of Keita's friends out by the warehouse area. Upon hearing that they don't know where he is, she brutally twists off their limbs
Getting confronted by Shiki shortly after the above moment happened