* Lung from the ''WesternAnimation/JackieChanAdventures'' fic ''Fanfic/QueenOfAllOni'' (by the same author as ''Fanfic/AShadowOfTheTitans'' below), comes across as this, crossing the MoralEventHorizon in his first real appearance by [[spoiler: kidnapping Jade and nearly KILLING her with ColdBloodedTorture in an attempt to break her to his will, even blaming ''[[NeverMyFault her]]'' when it fails!]] (In fact, his backstory reveals that when he was a child, he hid rocks and sticks around the neighborhood to beat the other kids up with). [[spoiler: One reviewer even PRAISED him being KilledOffForReal by Right]].
* Suzano, from the ''WesternAnimation/JackieChanAdventures'' and ''WesternAnimation/TeenTitans'' fanfic ''Fanfic/AShadowOfTheTitans'' [[spoiler:(and ''possibly'' the author's other story, ''Fanfic/JewelOfDarkness'', as a character with the same name and powers appears there as well)]], is unnecessarily rude towards ''everyone''. At first his hatred towards Jade seems to be pure FantasticRacism towards her part Oni nature, as he is part Japanese god, but as he is later shown on a team with what appears to be a ''demon'' and a ''ghost'', it seems more likely he just uses FantasticRacism as an excuse to let out his {{Jerkass}} tendencies.
** Gizmo, Commander Hollywood (a HIVE teacher), and Kitten also apply.
* RonTheDeathEater is when a character is either {{Flanderized}} into a JerkAss or more into more of a JerkAss than they were in canon.
* ''Fanfic/WithStringsAttached'' has a lot of these: Terdan, As'taris (almost all Baravadans, actually), the Hunter [[spoiler:(though he undergoes {{Character Development}})]], and most especially Jeft. Also, the Dalns gods are {{Jerkass Gods}}, though this is only talked about, not depicted.
* ''TheHarmonVerse'' has a couple of these: The titular protagonist, Jack Harmon, being the biggest offender of them all.
* ''Fanfic/CalvinAndHobbesTheSeries'': Although Calvin TookALevelInKindness, he still fits this trope.
** [[BunglingInventor Sherman]] even more so.
* In FanFic/TheTaintedGrimoire, everyone in Acidwire is this.
* In the KatawaShoujo fic Lilly Epilogue: Family Matters, Lilly's father is this, even apart from the canonical ParentalAbandonment inflicted on Lilly and Akira for six years. He is incredibly condescending to Hisao and Hanako, referring to them [[HeyYou impersonally]] and making fun of their disabilities. In Hanako's case, he mocks her timidity and asks if she got her burn scars from catching the oven on fire; considering he was warned in advance and the real reason she got them, this is a borderline MoralEventHorizon. [[spoiler:He does apologize to Lilly and accept Hisao in the end, though]].
* In ''Fanfic/ProjectIgnition''... Adler- a selfish, arrogant... well, {{Jerkass}}. He'd be an outright villain [[MoralityPet if it weren't for]] [[ChildhoodFriendRomance his childhood friend, Selene]] (well, that and it's kind of hard to be a human villain when there's BETA around).
* In the ''{{Manga/Saki}} doujin ''[[http://www.mangapark.com/manga/saki-captain-half-doujinshi/v1/c0/all Captain Half]]'', Mihoko splits into two people in an attempt to cook for 80 people. Her counterpart is extremely mean, verbally and even physically abusing her teammates. When the [[DrillSergeantNasty coach]] barges in and complains about the other Mihoko "copying" her, the other Mihoko gives the coach a DeathGlare that stops her in her tracks.
* ''Fanfic/ThePrayerWarriors'' are by and large not nice people, especially since they're willing to kill anyone who refuses to convert or who engages in behavior they disapprove of, including former friends. However, among them, Michael stands out, since he's fairly rude and short-tempered compared to the others.
-->'''Michael''': ''(after Ebony asks to baptize [[HarryPotter Hermione]])'' "I will do it women. Do not try and disturb a sacred ritual. I do not want you to ruin it." ''(Baptizes Hermione)'' "No go. I don't think you deserve it. I think you are lying. But because Ebony trusts you, I will give you another chance. Now go satanic bitch."
** [[MyLittlePonyFriendshipIsMagic Fluttershy]] of all ponies, is portrayed this way prior to converting to Christianity in "The Prayer Ponies," being shown as an abrasive loner with no interest in talking with others.
* In ''FanFic/MegaManDefenderOfTheHumanRace'', Miss T is the most coldhearted of the Conduit's associates, and antagonizes Tiesel frequently. She also threatens to kill her other teammates should they make mistakes.
* Quite a few of [[{{Disney/Frozen}} Prince Hans']] brothers in ''Fanfic/FrozenHearts''
** Harald, captain of the guard, has two of his men dismissed over how they treated Hans, and retaliates by beating him up.
** Harken has, on at least one occasion, whipped a man so severely he ''died'' from it soon afterward. He also plans on whipping [[spoiler:Hans, his brother]] with a cat of nine tails that has shards of glass in it, and is largely motivated by a desire to ''save face''.
** Hugo is quite lecherous and dismissive of Hans. He and the two aforementioned brothers were said to take part in the game of pretending Hans was invisible, and it's mentioned that, for that reason, "if Hans had been more specific with Princess Anna, he'd have told her how much he hated Hugo".
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