The characters who appear in Blue Box.
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Main Characters
Taiki Inomata
Taiki Inomata
Voiced by: Shoya Chiba
The main protagonist of the story. An avid Badminton player he develops a crush on Chinatsu Kono of the Girls Basketball Team but is unable to approach her. He is shocked when Chinatsu ends up living with his family while her parents are abroad. He believes he has no chance with her, not realizing that Chinatsu already likes him.
- Cannot Spit It Out: For over 100 Chapters Taiki just can't seem to admit his feelings to Chinatsu. He finally does leading to their Relationship Upgrade.
- The Determinator: Though initially considered one of the lower ranked Badminton players he is able to improve himself through sheer grit and hard work. Other characters note that despite setbacks and losses he never gives up and keeps on pushing forward.
- Endearingly Dorky: Is often a complete dork when he's not playing Badminton which he worries makes Chinatsu think he's uncool. It doesn't.
- Insecure Love Interest: Believes he is not good enough for Chinatsu, even after they finally become a couple. Chinatsu is able to quickly reassure him.
- Nice Guy: Though self-deprecting and emotional he is truly a sweet kind-hearted guy. It's one of the main reasons both Chinatsu and Hina develop feelings for him.
- Oblivious to Love: Though he has a massive crush on Chinatsu he has no clue that both her and Hina like him.
- Relationship Upgrade: Finally becomes a couple with Chinatsu after they both confess their feelings to each other.
- Single-Target Sexuality: Has really only had eyes for Chinatsu, which does lead to poor Hina feeling heartbroken.
Chinatsu Kono
Chinatsu Kono
Voiced by: Reina Ueda
The star of the Girl's Basketball Team and and Taiki's crush. A beautiful and kindhearted girl she is well liked by everyone. While her parents are abroad she ends up living with Taiki's family (her mother is a former teammate and good friend of Taiki's mom).
- Affectionate Nickname: Most of her classmates in her grade call her "Chii".
- The Ace: Is the star of the Girl's Basketball Team and is constantly praised her skills. Kyo tells Taiki she is on a completely different level from him.
- Endearingly Dorky: Similar to Taiki, she is often a dork when not playing Basketball. And every moment just makes Taiki like her even more.
- Passionate Sports Girl: Basically describes Chinatsu in a nutshell. She loves Basketball and is the most dedicated to practice and improving herself. It's her passion and drive that first draws Taiki too her and they both continue to support and encourage each other. All the more devastating when in her third year she gets injured during the National Qualifer Game and her teams ultimately loses.
- Socially Awkward Hero: A Queen on the Basketball court, but quite awkward in social situations having a lot of trouble expressing her thoughts or feelings.
- Stepford Smiler: After she gets injured and her team loses the National Qualifer Game I'm her thrid year Chinatsu puts on a brave face for everyone. Until she is alone with Taiki near the river and her smile quickly fades showing how we devastated she truly feels.
- Relationship Upgrade: Finally starts dating Taiki after they both confess their feelings.
- Tomboy: Comes with being a dedicated Basketball player. She is almost always seen wearing her uniform, or comfortable gym clothes, though does wear a dress and of course the female school uniform. Still no matter what she wears Taiki is still utterly smitten.
Hina Chono
Hina Chono
Voiced by: Akari Kitou
The star of the Rythmic Gymnastics team and a classmate of Taiki. She constantly teases and annoys Taiki, though she considers him a good friend.
- Cloudcuckoolander: Comes off as one with her grand statements and overall energy. Though this is mostly to cover up her own insecurities (and annoy Taiki.) Nobody seems to be surprised when she wears a bear costume, or a reindeer outfit close to Christmas.
- The Gadfly: Loves teasing and annoying Taiki every chance she gets. First it's because he is so easy to tease and later it's to hide her growing feelings for him.
- Shipper on Deck: For Taiki and Chinatsu encouraging him to pursue her and make a move. Though doing so bites her in the butt when she realizes she has a crush on Taiki.
- Stepford Smiler: Tries to hide her pain from Taiki's confession behind a mask of optimism. It seems to fool everyone except Kyo and Ayame.
Friends and Family
Kyo Kasahara
Kyo Kasahara
Voiced by: Chiaki Kobayashi
Taiki's best friend who is also on the Badminton Team. Quite observant he is usually the one to point out things to Taiki and often knows more about what's going on than others.
- Genre Savvy: Is one of the only characters who seems aware of everything that's going on, especially in regards to Taiki, Hina and Chinatsu. Without even asking or Taiki saying anything he immediately guesses that Taiki and Chinatsu are finally dating.
- Hair of Gold, Heart of Gold: Blonde in contrast to his best friend, and a genuine nice guy under all of his snark.
- Nice Guy: Though quiet and quite blunt (especially with Taiki) he is truly a kind-hearted guy.
- Only Sane Man: To most of the more eccentric personalities of the other characters, especially Taiki, Hina and Ayame.
Kengo Haryu
Kengo Haryu
Voiced by: Yūma Uchida
An upperclassman and talented Badminton player who takes Taiki under his wing. He becomes both a rival and mentor to Taiki.
- The Rival: Initially starts out as one for Taiki, but soon grows more into more of a mentor role, even if his methods are basically Training from Hell. He later becomes the first major opponent for Taiki in his second attempt to make Nationals.
- Trickster Mentor: Helps to train Taiki and help him improve...by putting im through the Training from Hell and even making a wager to give Chinatsu's contact info to a classmate whose interested in her.
- Vitriolic Best Buds: With Taiki as his Badminton skills improve, never missing an opportunity to tease Taiki.
Karen Moriya
Karen Moriya
Haryu's girlfriend and a good friend of Chinatsu. Though tough on Haryu at times she is the most mature out of the central characters.
- Foolish Sibling, Responsible Sibling: The responsible older sister to her "foolish" younger sister Ayame.
- Team Mom: Though not officially on any of the Sports Teams she still shows support for them especially Haryu, Chinatsu and Taiki.
- Shipper on Deck: For Taiki and Chinatsu especially after she gets Chinatsu to admit she is actually interested in Taiki.
Ayame Moriya
Ayame Moriya
Karen's younger sister who becomes the manager of the Boy's Badminton Team. A self-proclaimed matchmaker who has dated nearly every guy in school.
- Girlish Pigtails: Wears her hair up two long pigtails to show both her younger age and lack of maturity in contrast to her older sister Karen who always wear her hair down.
- My God, What Have I Done?: Tries to encourage Hina to get together with Taiki. She witnesses the immediate aftermath where Hina collapses into a sobbing mess and Ayame realizes she made a huge mistake.
- Tsundere: Towards most people but especially Kyo, who she initially says she despises. Though hints that she is developing genuine feelings for him do pop up confusing her.
- Uptight Loves Wild: Inverted. The freespirited and outgoing Ayame ends up developing feelings for the self-serious and introverted Kyo.
