I went ahead and read all the lore about how each character got their vision. Posted it like half a year ago, list updated.
Albedo: He waged.
Alhaitham: Read a book
Amber: She realized she’s useless.
Arlecchino: Did a training montage while wanting to kill her adoptive mom
Ayaka: While others were out partying, she studied the blade
Ayato: It was on his chest after inheriting their family buisness.
Baizhu: He decided that no one will get Changsheng after he dies.
Barbara: Healed a child with the power of singing
Beidou: She fucked up a sea serpent
Bennett: Almost died during solo exploration
Candace: Told the boomer village elders to fuck off
Charlotte: Just appeared after she wrote a dangerous article
Chasca: She shot the schizo voices in her head
Chevreuse: Won a sniper duel
Childe: No clue
Chiori: Tamoto gave it to her after deciding to become a french immigrant
Chlorinde: Messed up some corpo CEO in a duel
Chongyun: Shonen protagonist „he didn’t want to quit” stuff
Citlali: Made some wowen scrolls, hallucinated some schizo stuff with her (not yet given) ancient name’s previous holder
Collei: Saved a kid
Cyno: Read a book
Dahlia: Decided to read theology after becoming the pope
Dehya: She forgor
Diluc: He just got it at a young age, truly unmatched
Diona: Her dad got lost in a storm, she went to find him
Dori: Got it after her sister died of being poor
Emilie: She did some free mental care job before cremating some remains
Escoffier: Wanted some ice, vent to Mexico for it
Faruzan: After she got out her 100 year escape room it just appeared while trying to go home
Fischl: It just appeared to complement her chuunibyou.
Freminet: Saved his Fatui bros.
Furina: Acted really hard while saying she wouldn’t act ever again.
Gaming: He tamed Man Chai
Gorou: He realized zerg rush is a better strategy than hero units
Heizou: Friend died
Iansan: Trained for 1000 days to lift a barbell
Ifa: Finally took his meds
Itto: He just woke up with it one day.
(cont.)