"I challenge the laws of nature and reason by summoning the power of destruction!"
Strait Jacket is a 2007 OVA based on a series of light novels that can basically be described as Hellsing with the magic system from Magical Girl Lyrical Nanoha and dashes of Steampunk.To put it in more detail, it's about a Badass Longcoat named Leiot Steinberg who fights demons along with his partners: Isaac Hammond, Kapelteta and Nerin Simmons. The premise is simple: In an Alternate History of 1899, sorcery is now a common technology, whose use has crept its way into every industry. However, those that use it run a risk... that they may become demons. Despite armor known as Molds designed to prevent this, there is always a chance. Thus enter Tactical Sorcerists, those that use sorcery to battle demons, while running the risk that they may become demons themselves.
Bifauxnen: Filisis. Aside from a barely-noticeable bust, she could pass for a boy.
Blood-Splattered Innocents: Isaac, after Rachel dies. Interesting in that he wasn't there when she died; he gets the blood on his hands after cradling her corpse. Later used for a Gory Discretion Shot when Isaac offs his corrupt boss and the blood paints the other side of his face. He wears it like war-paint until the end.
Body Horror: Every demon. EVERY demon. Even the one that looks (sort of) like a pretty flower.
Cool Old Guy: The Sorcerist who saved the young Isaac and Rachel and who taught a young Leiot to kill demons. Vulnerable to Mentor Occupational Hazard and The Plot Reaper, as he becomes infected himself and must be mercy-killed by a young Leiot twelve years before the movie starts.
Dying as Yourself: Isaac. Presumably being blown apart kept him from going feral like the other demons.
Expy: Strait Jacket features an orange-haired, green-eyed female scientist who, while associated with what's purportedly a military-powered organization, seems to distinctly lack martial ability herself. Although she carries a weapon, she's much more suited to motivating the other characters and moving the plot along, characterized by an apparent naivete and a stubborn streak. She wears a military uniform, with a skirt, but wears her hair long, and has glasses. Now, am I describing Nerin Simmons or Shion Uzuki?
Government Conspiracy: The director of the Sorcery Management Bureau, who sabotages Molds to ensure a steady flow of "business." It's implied that there would still be some incidents, but not at the stupidly high current rate.
Knight in Shining Armor: Isaac, even to the point where he saves a kid and takes off his helmet while spotlit by sunlight.
Lolicon: Depending on how you view the relationship between Leiot and Kapel.
Madness Mantra: All demons (save for Isaac) have them, to unnerving effect; see High Octane Nightmare Fuel.
Magic Bullets: Literally, as we're given a scene where techie Sorcerists somehow cause a glowing ball of light to become ready-made bullets for the wands.
Men Don't Cry: Subverted; despite being clearly broken at Rachel's death, Isaac doesn't shed a tear.
Morality Pet: Again, depending on how you view the relationship between Leiot and Kapel.
Morality Chain: Apparently, Kapel is the only thing keeping Leiot from killing lots of people for no apparent reason.
Mundane Utility: Magic either kills things quickly or powers various modern utilities. In the OVA, we see more of the former.
Naughty Tentacles: One of the demons is essentially a face with tentacles who asks an injured girl if she "wants to play doctor" while slinking a tentacle towards her.
Not So Different: When Isaac accuses Leiot of giving all Sorcerists the reputation of murderers, Leiot replies that they're all killers. Later repeated in a Flashback Echo.
Possible Fridge Logic since it's stated that once a human enters the 'gibbering madness' state they're a demon through-and-through. Since demons are mindless and horrific abominations that prey on humanity, Leiot's maintaining that killing demons makes them murderers is... maybe a little not right.
Powered Armor: Molds are powered armor with the function of preventing the wearer from turning into a demon. Yeah, right. Tell that to Isaac.
To be fair, Molds and the underlying rune array vastly decrease the likelihood of the user turning into a demon, so long as said Mold is properly maintained and functioning as intended. Using powerful spells repeatedly is still not a good idea. Plus, what with the intentional sabotage of Molds going around...
Suicide by Cop: One interpretation of Issac's death; he had nothing left to live for after the death of his sister and discovering the dark secret behind his force.
Superpower Meltdown: Isaac turns into a demon from overusing his wand and firing off a spell while his mold was shattered, and Leiot has to mercy-kill him before Isaac becomes completely inhuman and rampages like the other demons.
Trauma Conga Line: Isaac. He realizes that his childhood hero was murdered by the man now tarnishing the reputation of his entire corps, possibly due to infection received while saving Isaac and Rachel because No Good Deed Goes Unpunished. His beloved younger sister and only family implores him to leave the job he loves, shortly before being horrifically killed by a demon. He finds out that his Corrupt Corporate Executive boss, whom he trusted and was apparently friendly with, had indirectly killed said sister by arranging demon attacks with the terroristsvia sabotaged Molds. Then he mutates into a horrific Eldritch Abomination and death is probably a relief after all of that.