Natsu Iwashimizu

A painfullly shy and insecure sixteen-year-old girl who used to get bulllied at school before she awoke in the post-apocalyptic world. In her old life, her pet cat "Macadamia Nuts" was her only friend.

• Apologizes a Lot
• Big Brother Mentor: Finds this in Arashi, Semimaru, and later Ango.
• Bully and Wimp Pairing: With Semimaru, even after they become friends.
• Character Development: In extremely slow steps, she's learning to think for herself and be more confident. Tends to happen when others aren't around and she's not too flustered to think.
• Dogged Nice Girl: To Arashi.
• Extreme Doormat
• Friendless Background
• Green-Eyed Monster: She's jealous of Hana, because she eventually falls in love with Arashi.
• It's All My Fault: When Arashi is poisoned by the mushrooms she gathered.
• I Can't Believe A Guy Like You Would Notice Me!: Her self-esteem is so low that she can't imagine any guy falling for her, especially after the human population got reduced so drastically.
• I Want My Beloved to Be Happy: Eventually towards Arashi.
• Kind Hearted Cat Lover
• No Periods, Period: Averted.
• Shrinking Violet
• Single Woman Seeks Good Man: She falls for Arashi because he was the first guy who was nice to her.
  • Again with Ango, who takes her under his wing.
• Stepford Smiler: She frequently hides her dislike for others or takes their abuse because she is too afraid of standing up to them and also frequently thinks that she will be disliked for expressing negative emotions.
• The Nicknamer: She's good with thinking up names for new plants, animals etc.

Arashi Aota

A kind and considerate seventeen-year-old who protects Natsu from Semimaru's bullying. The most important person in his life is his girlfriend Hana and he hopes to find her alive in the post-apocalyptic world. He's an excellent swimmer.

• Absence Makes The Heart Go Yonder: Averted.
• Berserk Button: He'd do anything to protect Hana.
• Beware the Nice Ones: Stabbed a guy who attacked Hanna with a knife and beat up the rest of his gang.
• Big Brother Mentor: To Natsu.
• Despair Event Horizon: When he becomes convinced that Hana is most likely dead.
• Ferris Wheel Date Moment: One of his flashbacks shows that he and Hana rode a ferris wheel during their first date.
• Oblivious to Love: He never notices that Natsu has feelings for him.
• I Will Find You: Towards Hana.
• Nice Guy: Unless you find his Berserk Button.
• Sensitive Guy and Manly Man: Sensitive guy towards Semimaru's manly man.
• Shipper on Deck: It's later on implied that he wouldn't mind it if Natsu and Semimaru became a couple.
• Victorious Childhood Friend: He knows Hana since they were ten years old.

Semimaru Asai

A rude and selfish eighteen-year-old deliquent with a bad homelife. He loves to pick on Natsu.

• Adult Child
• Book Dumb
• Don't You Dare Pity Me!: Is very prone to this.
• Fiery Red Head
• Genki Guy
• Hidden Depths: Over time. Who knew the guy could cook or could be a Stealth Mentor big bro?
• Hot Blooded
• Hypocritical Heartwarming: He is very mean to Natsu, but he won't allow others to treat her the same way.
• Japanese Delinquents
• Jerkass—> Jerk with a Heart of Gold
• No Indoor Voice
• No Sense of Personal Space
• Peek-a-Bangs
• Sensitive Guy and Manly Man: Manly man to Arashi's sensitive guy.
• Stealth Mentor: At times to Natsu. As a Loving Bully, of course.
• Son of a Whore
• Supreme Chef
• The Bully—> Loving Bully: Towards Natsu.
• Tsundere: Initially type A towards both Arashi and Natsu, but he later becomes type B towards Arashi.

Botan Saotome

She's the guide of Team Summer B and has an outspoken and confident personality. In the past she was a policewoman.

• Badass
• Badass in Distress
• Boobs of Steel
• Broken Bird: Had a miscarriage because she was involved in a car crash and as a result, her marriage crumbled.
• Cool Big Sis: Even her profile in the manga calls her that.
• Fair Cop
• Good-Looking Privates
• Hot Amazon
• I Want My Beloved to Be Happy: Even though her former husband later married another woman, she still wished him happiness.
• Lust Object: For Semimaru.
• The Tease: Reveals this side of herself much later in the story.

Matsuri Tendo

A cheerful sixteen-year-old girl who ran away from home.

• Bare Your Midriff
• Dark-Skinned Blonde
• Dogged Nice Girl: Towards Ryo.
• Genki Girl
• Hidden Depths
• Plucky Girl
• Shipper on Deck: She thinks that Ango has feelings for Natsu and encourages her to make a move on him.

Hotaru Kusakuri

A sweet little girl who used to work at a temple as a seer.

• Cheerful Child: Quiet, but always smiling and friendly.
• Fortune Teller
• Waif Prophet

Chimaki Yamori

An excentric artist who paints at every opportunity.

• The Aloner: Can often be found holed up somewhere drawing on whatever is available.
• Dissonant Serenity

Hana Sugurono

She's very outspoken and won't turn a blind eye to any injustice. Arashi is her boy friend.

• Action Girl
• Sins of Our Fathers: When Ango learns just who exactly her parents were.

Haru Yukima

• Elegant Classical Musician
• White-Haired Pretty Boy

Fujiko Amacha

• Gamer Chick: She mentions that she likes playing video games in her spare time.
• He Is Not My Boyfriend: When Hana asks her if she is interested in Tsunomata she says that their outlook on life is too different.
• The Medic

Momotaro Nobi

• Child Prodigy
• Cute Shotaro Boy

Mansaku Tsunomata

• The Archer

Hibari Niigusa

• The Ojou

Chisa Taiami

• Feminine Women Can Cook
• Team Mom
• The Ojou
• Yamato Nadeshiko

Yanagi Tosei

The guide of Team Spring. He ussed to work for the Japanese Self-Defense Force before that and is very authoritarian and sexist.

• Asshole Victim
• Attempted Rape: He blames Hana for getting bitten by a Mantis and tries this on her, but thankfully a storm interrupts him.
• Glory Seeker: He became a guide in the 7 project because he wanted to be a hero.
• Heroic Sacrifice
• Puppeteer Parasite: The mantis which stung him laid its eggs in his body and eventually the hatchlings started to control him.
• Redemption Equals Death
• Stay in the Kitchen

Ango

• Attempted Rape: Tries this on Hana.
• Beauty Mark
• Big Brother Mentor: First for Shigeru and then Natsu.
• Birds of a Feather: With Ryo.
• Broken Ace
• Control Freak
• Never Live It Down: Justified since he tried to rape Hana.
• Replacement Goldfish: Natsu is this for him since she reminds him so much of Shigeru.
• The Atoner: He wants to make up for Shigeru's death by saving Natsu.
• The Exile

Ryo

• Dark-Skinned Blonde
• Jerk with a Heart of Gold: Shows a softer side to Ango and Matsuri.
• The Exile
• The Stoic
• White-Haired Pretty Boy

Kururi

• The Cutie —> Break the Cutie
• Hair of Gold
• Unlucky Childhood Friend: Towards Ango.

Ayu

• Broken Bird
• Dissonant Serenity
• Does Not Like Men: And she has a damn good reason for it.
• Everyone Calls Her Madonna
• Security Cling: Towards Ango when she is overwhelmed with guilt.
• So Beautiful, It's a Curse
• Tall, Dark and Bishōjo

Genguro

• Friend to All Living Things

Nijiko

• Emotionless Girl

Ban

• Blinding Bangs
• The Medic

Unami

• Jerkass

Ran Shishigaki

• Hot Amazon

Akio Haza

Kurumi Shikano

Ryuusei Ogiwara

Sakuya Yamaki

Akane Nashimoto

Hazuki Karita

• Gentle Giant

Ryoya Izayoi

• Extreme Doormat
• Heroic Sacrifice

Takahiro Aramaki

• Tragic Bromance: With Fubuki.

Fubuki Samejima

• Belligerent Sexual Tension: With Mitsuru
• Tragic Bromance: With Takahiro.

Mitsuru Kagurazaka

• Belligerent Sexual Tension: With Fubuki.
• Tall, Dark and Bishōjo

Mutusuki Karezono

Arare Fushizuke

Fuka Ayatori

Toji Murozaki

Sayuru Kumakawa