Main Characters
Voiced by: Hinaki Yano (Japanese), Alyssa Marek (English)

A ninja runaway and a candidate to become the next leader of the Iduera Village. She is able to kill Yoma several times her size without taking any damage, but she is usually a NEET and a subculture-loving otaku who spends her days playing games.
- The Ace: She's considered the strongest kunoichi of her clan.
- Action Girlfriend: Shizuri is a Yoma-slaying kunoichi who becomes the bodyguard/roommate of the office worker Tsukasa.
- Always Someone Better: Shizuri is dismayed that Tsukasa triumphs her in gaming. She is also not happy that Kiraa is following suit.
- Because You Were Nice to Me: The main reason Shizuri begins falling for Tsukasa who accepts her NEET lifestyle rather than turning away like so many of her protectees.
- Berserk Button: There are two things no one should ever press on. 1) Don't ever wreck her NEET lifestyle. And 2) Don't mess with her time with Tsukasa.
- Bespectacled Cutie: She wears big glasses when she's in Otaku NEET mode.
- Bodyguard Crush: She convinces Tsukasa to hire her as his personal ninja bodyguard. Initially, she only wants him to provide for her and let her crash at his place, but she quickly starts falling for him.
- Brilliant, but Lazy: She is one of the most powerful ninjas that can give her opportunities to become clan head but opts to leave it all and become a NEET.
- Can't Hold Her Liquor: Shizuri has a low tolerance in alcohol, best shown when she goes into a drunken stupor from drinking one cup.
- Clingy Jealous Girl: Shizuri doesn't take kindly of any girl trying to make moves on Tsukasa and is more than happy to end them.
- Gamer Chick: Shizuri spends hours on end playing various video games.
- The Glasses Come Off: She only takes off her glasses when she's fighting the Yoma.
- Highly Visible Ninja: The only things Shizuri uses as a civilian disguise is a tracksuit and a pair of glasses.
- Idiot Hair: She has a long, askew strand of hair emphasizes her quirky Otaku traits.
- Otaku Surrogate: Not only is she a huge otaku, she also just happens to be into the exact same male-oriented anime and video games as the nerdy male protagonist.
- Paper-Thin Disguise: Subverted. Many people take notice of a bespectacled girl wearing a form-fitting ninja outfit underneath the tracksuit.
- Pretty Freeloader: Shizuri's MO involves her saving Ronin from Yoma attacks then stay at their homes as payment.
- Rogue Agent: Shizuri is this after leaving the clan who afterwards put out a hit on her.
- Rose-Haired Sweetie: She's a cheerful and friendly pink-haired girl.
- Single Woman Seeks Good Man: She falls in love with Tsukasa because he treats her kindly.
- We Want Our Jerk Back!: Downplayed on the jerk part and Played for Drama. Shizuri decides to willingly work so that she can be a better protector to Tsukasa. However, everyone can see that she is quietly suffering and Tsukasa decides to further train on his Ronin abilities in hopes that can solve the issue.
Voiced by: Shoya Ishige (Japanese), Adam Gibbs (English)

An ordinary office worker who is descended from a family of warriors which makes him a target of the Yoma. One day, Shizuri protects him from a Yoma and she convinces him to let her become his roommate in exchange of protecting him from danger.
- Affectionate Nickname: Shizuri calls him "Tsu-chan".
- Beady-Eyed Loser: He starts as a loser office worker and is the only character with beady eyes.
- Deceased Parents Are the Best: Tsukasa's actual parents died before being adopted into a new family.
- Distressed Dude: With Yoma constantly hunting him and lacking no combat skills whatsoever, the dude is a sitting duck.
- Househusband: Since Shizuri is a NEET, Tsukasa does all the cooking and housework at their apartment.
- Nice Guy: The guy is pretty chill about the whole ninja-monster war he winds up into and is more than happy to cater to Shizuri.
- Non-Action Guy: He's a normal guy with a kunoichi roommate. Shizuri fights the Yoma to protect Tsukasa in exchange of him letting her crash at his apartment.
- Super-Empowering: His Ronin ability allows him to alter the Ley Lines and grants power to the ninja serving him.
- Supreme Chef: A lot of people commented on how great of a cook Tsukasa is.
Kunoichi
Voiced by: Fairouz Ai (Japanese), Karlii Hoch (English)

A perverted chunin with a masochistic streak and an obsession with Shizuri.
- Abhorrent Admirer: Shizuri is repulsed by Ayame's obsession with her and often reacts harshly when Ayame gets pushy. Unfortunately to her, Ayame is a masochist, so she sees these violent rejections as "rewards".
- Buxom Beauty Standard: Ayame has the largest bust in the cast, which several of the other girls are jealous of. Ironically, they're Fake Boobs so she always gets nervous when the others focus on it, despite otherwise wanting their attention.
- Fake Boobs: Supported by Magical Ninjutsu.
- The Friend Nobody Likes: Shizuri absolutely despises Ayame and the other kunoichi are not far behind, being quite annoyed with her.
- Gender Bender: Ayame uses Magical Ninjutsu to turn from male to female.
- Psycho Lesbian: She is labelled as one in-universe (CPL stands for Crazy Psycho Lesbian). Subverted on the "lesbian" part. Turns out Momoichi is a CPO (stands for Crazy Psycho Otokonoko) who found the way to turn himself into a girl.
- Stalker with a Crush: Ayame is obsessed with Shizuri, which is the reason why she went out to search for her in the first place. She is constantly following her around and stalking her.
- Too Kinky to Torture: Ayame adores the pain inflicted onto her, ranging from verbal abuse to attacks caused by both Yoma and/or kunoichi.
- Ungrateful Bastard: Even after Tsukasa makes good on his promise to not reveal that Ayame is a man disguising himself as a woman and also didn't reveal the fact Momochi tried to attack Tsukasa out of petty envy the pervert still continues to try and break Tsukasa and Shizuri apart.
- Yandere: Ayame is hopelessly obsessed with Shizuri and won't hesitate to put Tsukasa in harm's way just to see her.
Voiced by: Saya Aizawa (Japanese), Natalie Rial (English)

A genin kunoichi from the same village as Shizuri and Ayame. She has really bad luck and it spreads not only to herself but to those around her when she feels negative. She violated her village's taboo by falling in love with Toru, who is currently her master. She was faced with the choice of either being replaced by another ninja or leaving the village, and chose to leave. She later becomes Shizuri's neighbor.
- Apologises a Lot: She frequently apologizes for anything she thinks she did wrong as well as the problems caused by her bad luck.
- Beta Couple: With Toru. Their relationship is similar to Shizuri and Tsukasa.
- Bodyguard Crush: She fell in love with Toru, the master she's been tasked to protect.
- Born Unlucky: Hina is notoriously unlucky.
- Clingy Jealous Girl: Like Shizuri, Hina doesn't any woman being close to Tōru.
- Cute Clumsy Girl: She's accident-prone due to her bad luck and almost all of her attacks gets misfired because of this.
- Older Than They Look: Hina is around the same age as Shizuri but no one seems to notice this with Himari even remarking that she looks like a teenager.
- Shy Blue-Haired Girl: She has blue hair and is very shy.
- Single Woman Seeks Good Man: She loves Toru because he's such a Nice Guy.
- Walking Techbane: Because of her bad luck, the power can crap out at any moment whenever she's near, making her a nightmare for the game-obsessed Shizuri.
Voiced by: Hina Kino (Japanese), Katelyn Barr (English)

The leader of the Natsumi Village. She calls herself Shizuri's rival, but only gets ignored by her.
- A-Cup Angst: Hina doesn't try to hide how upset she is of her petite figure and constantly butts heads with Ayame and her voluptuous figure.
- I Just Want to Be Special: Kanna constantly tries to fight Shizuri out of a desire to prove herself. She takes a liking towards her job as a Meido because of how much positive reception she is receiving.
- Girlish Pigtails: She has the classical Tsundere girl's twintailed hairstyle.
- Jerk with a Heart of Gold: Kanna is a by-the-books kunoichi with a bossy attitude, but she has a good heart and is willing to stand up for her friends.
- Tiny Tyrannical Girl: She constantly reigns down on others despite being short.
- Tsundere: Harsh type. She's arrogant and competitive, but has a soft side too.
- Unknown Rival: Kanna styles herself as Shizuri's rival but Shizuri hardly recognizes this, given the many times the latter has beaten the former.
Voiced by: Yui Horie (Japanese), Patricia Duran (English)

The former leader of the Underground Squad of Ideura Village. When she was in the village, she was the mentor who raised Shizuri. She is currently the landlady of the apartment building where Shizuri and her friends live.
- Absurdly Youthful Mother: Take note that Shizuri is around her twenties and Saya hardly looks different from when Shizuri was still a child.
- Luke, I Am Your Father: Sans Shizuri herself, everyone is shocked that Saya is Shizuri's mother.
- Sexy Sweater Girl: She wears a gray sweater, which really accentuates her maternal figure.
- Shipper on Deck: Saya approves Shizuri and Tsukasa's relationship and hopes she'll see her grandchildren.
Voiced by: Konomi Kohara (Japanese)

Kanna's younger sister.
- Big Little Sister: She's taller and bustier than her older sister Kanna.
- Rebuilt Pedestal: Yuzu is crushed that her older sister is spending her time working at a maid cafe. It gets rebuild after learning that Kanna is working there to learn from Saya on how to create Mirror Barriers which are essential to their clan.
Civilians
Voiced by: Shou Nogami (Japanese), Gabriel Regojo (English)

An ordinary office worker who has a master-servant contract with Hina. He is responsible for stabilizing Hina's mental state and suppressing her tendency to attract bad luck.
- Beta Couple: With Hina. Their relationship is similar to Shizuri and Tsukasa.
- Nice Guy: The guy is just plain wholesome which makes Hina falling for him that much more understandable.
- Satellite Love Interest: He doesn't have anything going on besides being Hina's love interest and his only notable character trait is being a Nice Guy.
- Understanding Boyfriend: He's very kind and supportive of Hina despite her being a low-level kunoichi and fumbling a lot because of her bad luck.
Voiced by: Manatsu Murakami (Japanese), Cat Thomas (English)

A high school girl who lives in the same apartment building as Shizuri and Tsukasa. She is an avid lover of romantic comedies.
- Genki Girl: Himari is peppy and very passionate about her goals.
- Stalker Without a Crush: Himari stalks the heck on couples to see their romantic prospects.
Yoma
Voiced by: Mayu Sagara (Japanese), Olivia Swasey (English)

A high-ranking Yoma who came to the human world to harvest the souls of samurai.
- Blood Knight: Killa went to the Human world to find strong opponents to beat.
- Even Evil Has Standards: Kiraa is in tears out of belief Shizuri has abused Tsukasa's generosity.
- Shark-Toothed Humanoid: She has shark-like teeth.
- Sinister Scythe: She wields a scythe.
Voiced by: Yurie Kozakai (Japanese), Brittney Karbowski (English)

A high-ranking Yoma who acts as Killa's partner. Compared to Killa, she has a much more laid-back personality.
- Stronger Than They Look: Despite her cutesy demeanor, Clena is just as strong as Killa.
