There will be unmarked spoilers for those who haven't read the light novel.
The Anti-Spirit Team, or AST, is a special secret unit within the Japan Ground Self-Defense Force, the main branch of the Japan Self-Defense Forces responsible for the land-based military operations. The AST is designed to suppress and eliminate the Spirits by means of killing them, though, they have yet to do anything more than drive them off. The public have no knowledge of this Special Forces Unit. Currently, it is shown that the AST is made purely out of females and for the most part, teenage girls.
- Amazon Brigade: A group of very attractive young women dressed in suits of armor that don't leave much to imagination.
- Demoted to Extra: After the departure of the two most important members, Origami and Mana, they get pushed into the background.
- Faux Action Girl: For the most part, theyre completely ineffective at killing the Spirits that theyve been trained to fight. Mana stands out for doing so, but shes really just been killing Kurumis weaker clones, barely surviving her first encounter with the real deal.
- Hero Antagonist: It's not hard to imagine they would be the heroes if the story didn't take place from the Spirits' point of view.
- Powered Armor: The Combat Realizer unit, a magically-powered armor that gives it user enhanced strength and special weapons to fight Spirits.
- Sympathetic Inspector Antagonist: True, they want to destroy Spirits, but only to prevent them from causing human casualties, given their spacequakes are very real dangers to people. They might not even be aware of Shido and Ratatoskr's more lenient methods of dealing with them.
Captain Ryouko Kusakabe
Voiced by: Ao Takahashi (Japanese), Caitlin Glass (English)
- Blood Knight: Shows shades of this when ordering her troops to continue firing non-stop.
- The Captain: She's the leader of the regular AST squad sent to fight the Spirits, as well as Origami's direct superior.
- Chewing the Scenery: She's prone to violent outbursts when her stress gets the better of her.Ryouko: Screw you, spirits!
- Christmas Cake: She's 27. And she doesn't seem to be attached yet.
- The Comically Serious: She orders her AST squad to prepare for a mission... while packing on luggage for said mission, which is a trip to the hot springs.
- Cool Big Sis: Towards Origami and the members of her AST squad.
- Could Say It, But...: After getting ridiculous orders by the DEM squad that is placed with her team, she goes to the room that Origami (who she has been ordered not to include in or even let know that there is a mission) is changing in and proceeds to rant about the mission to attack Tengu square during the festival while people are still there and kidnap Tohka and Shidou, as well as lamenting the fact that she's so angry that she might just leave the room with the special weapon White Licorice unlocked.
- Curtains Match the Window: Dark grey eyes and hair.
- Establishing Character Moment: The Hot Springs Episode alone shows what's she's capable of.
- When DEM starts giving orders that focus more on accomplishing a goal than protecting the citizens, she doesn't hesitate to explain just how much of a problem immoral orders are to her. When she's ignored? She decides to indirectly sabotage their efforts.
- Large Ham: Very much so in the Hot Springs Episode, and it's quite jarring as she's typically very serious.
- Older Than They Look: She's 27, and yet looks only a bit older than Origami.
- Rage Breaking Point: Normally she keeps a professional attitude about everything, but when she gets fed up with the obstacles in the way of her squad's trip to the hot springs, in addition of the previous stress built up due to her superiors' rantings, she snaps and comically goes on a rampage to destroy Ratatoskr's traps.
- Reasonable Authority Figure: Cares deeply for her team and the citizens that she's protecting. When the DEM starts giving questionable orders, she does everything she can to do her duty to her squad and the people of Tengu city. She also shows worry and confusion when suddenly not ordered to deploy in Volume 10.
- Red Eyes, Take Warning: Played for Laughs; when she snaps in episode 6, she orders her squad around like a raving lunatic and her eyes glow red.
- Wingding Eyes: Her pupils turn into hearts when her subordinate tells her the AST team has organized a replacement trip to Tenguu Paradise Hot Springs, enough she tells said subordinate she's earned a higher position.
Second Lieutenant Mana Takamiya
Voiced by: Misato (Japanese), Felecia Angelle (English)
Shido's real sister. She was transferred from the DEM to the AST, where she holds the rank of Second Lieutenant, callsign Adeptus 2, to aid the Anti-Spirit efforts. She underwent a procedure to strengthen her body, making her a Wizard, and in exchange has only 10 years to live. In Volume 6, she is revealed to have defected to Ratatoskr, having been informed of this truth.
- Action Girl: And a pretty badass one at that. She's stated to have killed at least one spirit (although it later turns out to be one of Kurumi's lesser clones), and saves Origami from Bayley's group in season 2 singlehandedly.
- Arch-Enemy: She and Kurumi are constantly at each other's necks. Even when Shido tells her they have to work together with Kurumi temporarily, Mana begrudgingly accepts to assist.
- Badass Adorable: As expected of a cute pre-teen girl who is also a trained soldier.
- Beauty Mark: Under her left eye.
- Child Soldier: Par for the course for most Wizards recruited by the AST / DEM, but it's exacerbated by the fact that she has no memory of her past except for a pendant which holds a photo of her child self and a young Shido.
- Clingy Jealous Girl: Towards Shido when Kotori is around, as she can't stand the fact that Shido has joined an organization with lots of contact with the Spirits and criticizes Kotori for it.
- Defector from Decadence: In Volume 6, she defects from the DEM after learning the truth about what happened to her.
- "Do It Yourself" Theme Tune: Her Japanese voice actress, Misato, is one fourth of the band "sweet ARMS", which performs all opening songs.
- The Glomp: She is fond giving bear hugs to Shido.
- HeelFace Turn: She defects to the Ratatoskr's side after finding out what DEM did to her body.
- Keigo: She has an odd speech pattern that combines polite Japanese with almost comically masculine Japanese.
- Laser-Guided Amnesia: Mana forgot who her brother was. The only clues she had of him were a photograph of him and that she remembered calling him "onii-sama". She also forgot about Mio, someone who apparently tried to prevent DEM from kidnapping her.
- Long-Lost Relative: She is Shido's biological sister. The reason for their separation seems to be due to DEM, but unlike Shido she failed to escape.
- Or so we're led to believe. That pendant of hers mentioned under the Child Soldier trope, the one that supposedly has a photo of her and her biological brother? That much is true. However, we'll be entering spoiler territory for the complete truth about that pendant. That's not actually Shido in the photo, but her real biological brother, Shinji. The reason for their separation is given light in Volume 17, where it is revealed that 30 years ago, Mana was kidnapped by Westcott and the then-newly founded DEM, who used her against Shinji in exchange for Mio (the First Spirit). Shinji himself is gunned down by Westcott when the former tried to escape with Mio, who then absorbed Shinji in her body so he'll be reborn as Shidou.
- Little Sister Heroine: Much like Kotori, Mana is dedicated to protecting Shido.
- Luke, I Am Your Father: A non-parental variation. Shido learns that Mana is his biological sister.....but we the audience learn different later on in the series. See that huge spoiler under Long-Lost Relative for more details.
- Mercy Kill: After seeing Bayley's sorry state after exerting herself too much just to pilot the Scarlet Licorice, Mana reluctantly kills her, but not before falsely reassuring that Westcott will acknowledge her.
- O.O.C. Is Serious Business: When hearing Artemisia was helping Westcott and Ellen, she's visibly shocked and worried, stating she's an SSS ranked wizard (a rank higher than even the strongest known Inverse Spirit rank) and that had she joined when Mana was still Adeptus 2, she'd have been demoted.
- Older Than They Look: She was actually kidnapped by DEM a short while after the arrival of the First Spirit, meaning that despite her pre-teen appearance, she's actually in her early/mid 40s.
- Opt Out: She leaves the DEM by the time Volume 6 rolls around.
- Screw This, I'm Outta Here!: Once Mana learns about what really happened to her, she decides she's had enough of the DEM and leaves.
- Super Soldier: She specifically underwent augmentations to become a Wizard, and it shows when she's able to mop up anything that's not a Spirit or Ellen, living up to her rank as Adeptus 2.
- Uncanny Family Resemblance: She looks a lot like Shido, down to the hair color and eyes.
- What the Hell, Hero?: Rips into Kotori for sending Shido into contact with Spirits unarmed, leaving him with no way to defend himself, after she saved him from Kurumi. She even calls her a failure of a little sister.
- You Gotta Have Blue Hair: Same color as her brother's no less, which is one of the few things that shows they're siblings.
- Your Days Are Numbered: She has only 10 years left to live, having undergone a procedure to strengthen her body enough to fight on par with Spirits. She's not told of this side-effect until Volume 6, and when she learns this, she defects to Ratatoskr who are treating her to try and regain her lost lifespan. The procedure was finally undone by Kurumi using the last of her powers on her.
Private Mikie Okamine
Voiced by: Kanami Satou (Japanese), Sarah Wiedenheft (English)
A girl new to the AST who idolises Origami. She holds the rank of Private in the AST. Is also in Shido's school and in the second year, but having skipped one grade is one year younger than her peers. Is Tamae's cousin. She's the main heroine of the spinoff manga Date A Strike/Date Ast Like.
- Affably Evil: When it comes to spirits. To her, they're all evil monsters in her eyes. The first few scenes of Date A Strike has her visioning Tohka as a ruthless killer killing thousands. This is how she views all spirits.
- Anti-Villain: She is not a bad person, she is just on the wrong side.
- Dark and Troubled Past: Her dad kicked her out of her own house and she became suicidal. This led her to ignoring a spacequake alarm where she encountered a then untamed Tohka. If it wasn't for Origami, she would be dead. After this, it's easy to see why she had a nightmare about Tohka being a mass murderer.
- Irony: Becomes friends with Tohka later on, although she has no idea she is the same spirit that defined her view of them, or that she's even a spirit at all. In Volume 13 she asks Origami to rejoin the AST... unaware that she's also a Spirit now, or rather had been for a while depending on when Phantom made her one in the new timeline.
- New Meat: One of the most recent arrivals in the AST.
- Those Two Girls: She's rarely seen without Mildred.
- Villain Protagonist: An AST private and the protagonist of Date A Strike. She sure doesn't act like a villain though.
Sergeant First Class Mildred F. Fujimura
Voiced by: Saki Ogasawara (Japanese), Kristin Sutton (English)
- But Not Too Foreign: If her first name is of any indication.
- Multi-Ethnic Name: Her first name's origin contrasts with her Japanese last name.
- Satellite Character: Unlike Mikie, she doesn't get much characterization or attention. Not even anything about her former work while part of the DEM.
- Those Two Girls: Rarely seen without Mikie.