F/SN
Summoned as Caster (due to his tendency towards Item Creation and his most visible feats being magical)
His master is a massive dickbag who tries to make OCdoriol use his magic for his own gain and ignore the war until the last.
OCdoriol lops his arm off with his lightsaber before stealing all of his grimoires and heading off. He uses the grimoires to create boundary fields and magic circles to draw on power long enough for him to survive and get to the Temple where he sets up a more permanent solution
He finds the master of assassin before they summon, a very average mangus with only a few circuits but a massive determination to reach the Root… OCdoriol offers him a chance, give up his arm and command seals or die. Between the Force persuasion (which the mangus doesn’t recognize as magic and resist) and his status as a Servant he convinces him to give up his arm, which is a lot less painful for him with his cooperation
OCdoriol finds Bazette after Kirei steals Lancer but before she dies, and uses some of his Healing potions to save her, then a combination of Sith Alchemy, the Force, and another healing potion to graft the arm from his previous master on her before she wakes up.
She’s really leery about working with him, not that he can blame her, but with a proper Master as well as his knowledge (which he plays off as due to his Scrying of things) they’re a terrifying pair, especially once he gets Kuzuki into it as well. He can’t enhance people as powerfully as Medea could have, but with Bazette’s runes and his own combination of Force enhancement as well as Reinforcement-style Arcane magic, it’s still a decisive boost for all involved.
OCdoriol grafts the Command Seals for Assassin into Kuzuki and helps him summon a True Assassin who will (begrudgingly) listen to OCdoriol since his master does. Bazett thinks this is a bad idea, but OCdoriol is cautious and talks with Assassin and the Man on the Mountain is willing to agree that something as horrible as the tainted grail does not deserve to exist and must be destroyed. He’s willing to work with a heathen like Caster to accomplish this and save the innocent.
OCdoriol places the magical equivalent of landmines along the entire stretch of the path to the temple, not breaking the flow of the leyline but rather tapping into it to vaporize any Servant silly enough to attack
Cue Berserker attacking the Temple, without False Assassin, they have trouble, but OCdoriol can rain magic down at them with impunity, the runes of paralysis, devastation, destruction, and more all slowing down the Magic-Resistance-less Berserker. Berserker simply can’t get too far from Illya or the spells raining down on him will kill her, and Illya isn’t immune to the traps that Berserker triggers and the two have to fall back. Berserker himself was never in any danger, but Illya was. Cue sighs of relief from both Bazette and OCdoriol.
OCdoriol takes tons of (electronic) notes on the runes that Bazette uses as well as everything she mentions about them
OCdoriol meets with Rin as she comes out of school, Blood Fort Andromeda has been set up. Rin automatically assumes that ‘Caster’ is the source of the effect, but he denies it as he tries to crack the magic put into it. Doubting she’ll listen to him now, he only points out that her sister has been suffering, thinking that she doesn’t care about her, ‘idly’ noting the horrors she has to withstand. Rin almost has Archer attack him for this (wounded by Saber or not), but thinks better of attacking a Servant at full strength with a partial strength one and heads off to investigate his claim.
Not two days later, the Mataou mansion is reduced to rubble.
OCdoriol feels like a complete badass considering that he’s been successfully manipulating the war so far aside from the whole ‘summoning Saber properly’ bit. He didn’t have time, but still, this has been working really well so far
Shirou gets kidnapped by Illya and OCdoriol finds this out when he notices the prana surging in the Eizenbern lands. Excalibur had been used. Well fuck. He rushes over to find an exhausted Saber, wounded Rider, Shirou, Rin and Sakura all together. Damnit.
He’s not really able to convince them of his good intentions, but they don’t attack him. Still, he ensures they’re all healed up and safe before getting them home.
Gilgamesh takes exception to ‘Caster’s interference with things and attacks the temple. OCdoriol is rather obviously unable to hold him off, but teleports Bazett to the Emiya household with instructions to get Saber recharged (With a tantric ritual if necessary) and that Shirou holds Saber’s Sheath. Between himself, Assassin, and Kuzuki, they try to hold Gilgamesh (or even beat him if at all possible) as long as they can. Between the three of them, they don’t last long, but OCdoriol is actually able to remove one of Gilgamesh’s arms with a cheap trick and his lightsaber before getting exploded
Baldur’s Gate
Summoned once more by the same master, there’s no plot to really resolve right now, she was more checking that he was okay… then smacks the crap out of him for worrying her like that. He’s given the Sword of Chaos, Saerevok’s powerful blade, which works for him just fine since as far as the Sword is concerned, OCdoriol is Saerevok.
Only a small portion of the group that helped take down the demigod Saerevok stays together, bound by bonds of mutual friendship! (and safety)
OCdoriol uses Alteration and Reinforcement creatively to create gemstones and gold from the particulates in the air or water, which makes the group surprisingly rich. Rich enough to massively expand their spellbooks, equipment, and get proper instruction on how to craft magical items as well as blacksmithing. He heavily improves his equipment by enchanting all the things with the help of his Master. They get OCdoriol an extensive ‘spellbook’ in his electronics
Then they get kidnapped
OCdoriol is experimented on heavily as he’s obviously stolen the divine essence and soul of someone else, and as such, of great interest to their captor, who cuts him open and studies him extensively, but deliberately avoids killing him
They eventually break out, and once they’re out of a life or death situation, OCdoriol has a breakdown. He was barely able to keep them from casting spells once they got out and thus getting locked up with their captor
After enough time to calm down, he’s insistent upon them going after the asswad before he does some serious harm (which he knows he will) and the most of the group agrees. The ones that don’t are either swayed by the simple thing called revenge or because they’re friends are all going along with it
They ally with the Thieves Guild to get to the prison where he’s held and gather up a sum of money to make it happen. They perform increasingly epic feats and quests to do so, gathering more allies as they go. OCdoriol creates several extradimensional holding bags to carry more equipment, particularly a belt for his blades
OCdoriol starts to have a romance with one of the party members that’s been with them for a long time
One of their companions is killed… and OCdoriol goes outright berserk on the enemies that did so, pulling deeply on the Dark Side of the Force and the stolen Divinity
They fight an ancient Dragon as part of one quest and OCdoriol nearly gets eaten, but fuck if they don’t take it down. However, the confrontation drains his Master to the point where she can’t sustain his existence, and he fades out
Rosario + Vampire
Archer wakes up on a bus, confused as hell. He gets run into by a girl on a bike who introduces herself, sucks his blood, and then basically runs off.
He finds out he’s at Youkai Academy, a school for monsters that teaches said monsters how to integrate with human society. Apparently, his mind has replaced the original main characters, which really worries Archer as he’s afraid he killed someone that definitely didn’t deserve it. He also has his eyes, which is very weird as the rest of him is Tsukune.
Archer remembers the story well enough to know that if he doesn’t act, several girls are going to be molested at least, likely raped, others killed. He can’t, just… can’t let that happen. It goes against everything he is. He quickly becomes friends with Moka, the vampire that hit him, and searches for another of the girls that would be part of the harem to become friends with her and try and keep her from falling for the guy that would molest her. He also tries to find the young witch before she gets herself killed.
He’s successful, though he gets embroiled in some minor combat and wounded without his normal equipment or the conditioning he’d been working on. Even with functioning magic and the Force, without his equipment or conditioning he’s not as much of a match for superhuman monsters as he’d like.
He gets along with the girls rather well, though there’s no real romantic interest on his side or even most of the girls. The young witch and the succubus are exceptions, though for varying reasons. While he’s flattered and finds the succubus attractive, it’s really awkward for him considering he’s nearly a decade older than them mentally.
And then he gets his neck broke by a monster that gets a lucky shot in and as he fades mentally, Archer curses internally that it had happened. He’d gotten cocky.
Dragon Age Origins
‘Summoned’ by the Lyrium Well into the deep roads, he has to fight his way out and has to be turned into a Gray Warden to save his life. He ensconces Tsukune deep in his soul to keep him safe from the taint
With his magic on the fritz, he has difficulty in combat. He learns how to be a Templar from one of his companions to counter the magic of others while developing a style of combat to fight beings stronger, faster, and more skilled than he is as he's not all that strong without his magical enhancements.
They complete the Mages Guild (he absorbs the souls of several of the Abominations, which messes with his head), the Gray Warden Keep, and start to get things done in Dennerim… before OCdoriol is assassinated for being the most ‘obvious’ leader of the Gray Wardens and having let his guard down.