A bit too text-wally for the comments. Here's every error I found while taking a glance at the backstories.

Gene-Modded Beauty - Capitalized the I in "is" when it should be lowercase

Drill Operator - Should be "the discovery of insectoid" instead of "discovery of insectoid"

Walker Engineer - Should probably be "cost them their creativity" instead of "cost their creativity"

Barber - Second sentence starts weird, should be "He/She knows"

Addicted Gamer - Second sentence uses "His/her" instead of "He/She"

Vatgrown Colonist - Male variant, first sentence should be "his" Glitterworld instead of "him"

Structural Engineer - Second sentence should be "he/she" instead of "him/her"

Wretched Child - Male variant, first sentence should be "his" instead of "him"

Gifted Burnout - Male variant, last sentence should be "his" instead of "him"

Forgotten Child - should be "antique", not "antic". Tense in second sentence is also weird, recommend changing to "he wandered in and NOW tells of"

Industrial Tinkerer - Last sentence, should be "he/she" is high strung, instead of "his/her"

Reincarnated Soul - Second sentence, should be "his", not "him"

Ship Salvager - Uses "Himself" in both gender variants

Food Critic - First sentence should be "his/her", not "he/she"

Oracle - Should be "She/He", not "Her/Him" in last sentence

Apprentice - Should be "She/He", not "Her/Him" in second sentence

Corporate Spy - The first "he/she" in the last sentence should be "him/her"

Bull leaper - Second sentence, "he/she" should be "him/her"

Cult Leader - Second sentence, "his/her" should be "he/she"

Standard-bearer - Second sentence, "his/her" should be "he/she"

Midworld Programmer - Should be "medical software", not "Medicine software"

Landsknecht - Second sentence uses "his" regardless of gender

Landscape Painter - No errors, but second sentence is kind of awkward, "fund the costs of living, though it resulted in making [him/her] somewhat reclusive" would flow better

Dietetician - Should be "its", not "it's"

Art Critic - Somewhat of a run-on sentence, a period after "critics" would flow better

Tax Collector - Second sentence, should be "he/she" instead of "him/her"

Mattress Tester - "Contracually" should be "Contractually"

Extranet Troll - First sentence says "his" regardless of pawn gender

Prosecuted War Veteran - A bunch of stuff, here we go: First sentence is present tense when it should be past, second sentence says "Turning the war" which I assume should be "During", also "were" should be "was". Final sentence, uses "he/she" which should be "him/her", and re-integrating should be one hyphened word.

Incompetent Pilot - Uses male pronouns quite a few times regardless of pawn gender

Marauder, second sentence should be "he/she", not "him/her"

Pond Designer - Third sentence, should be "ponds" instead of "pond". Also "for [him/her], who left everything" comes across oddly, would suggest changing to "for [pawn name], who left everything"

Chemfuel Farmer - Last sentence uses male pronouns regardless of pawn gender

Train Driver - The sentence that starts with "One day" uses male pronouns regardless of pawn gender.

Medical Prodigy - Is actually called "Medicine Prodigy" in-game, Medical Prodigy sounds much more natural

Olive Farmer - Female variant uses "his" instead of "her" possessions in third sentence.

Child of The Anima Tree - Third sentence uses "Him/her" instead of "he/she"

Animatronic Mechanic - Should be "used to be" instead of "use to be"

Sim-raised - Male variant uses "His" instead of "him"

Blacksmith Apprentice - Male variant uses "him" instead of "his" throughout

Pod Child - Second sentence makes no sense, I assume it should be "Pawn's parents loaded him/her into a shuttle" instead

Forsaken Patriot - Both variants use she/he instead of her/him in second sentence

Deposed Royalty - Male variant uses "his" instead of "him" in second sentence

Bioweapon - Tense is wrong in last sentence, managing is present tense, destroyed is past. Should either be "later managing ... destroy" or "she later managed ... destroyed"

Catastrophe - Both variants use she/he instead of her/him in second sentence

Literary Critic, Male variant uses "him" instead of "his" in last sentence

Rodent Rancher - Male variant uses "him" instead of "his" in first sentence

Blackguard - First sentence is a run-on, needs commas

Cosplay Enthusiast - Breaks vanilla syntax by not listing the pawn's name