you's childhood friend and rival
Top-tier as both a pitcher and a batter
Chihaya's older brother by marriage
Usually as docile as a Chihuahua, but once it comes to baseball, he becomes as bold as a Doberman
A right-handed power pitcher

Friends with you and Yuki since middle school
A pitcher
Ends his sentences with "~yansu"
Refers to himself as "oira"
Has high pride and constantly taunts you for being cast down to a branch school, but acknowledges him as a rival—a tiresome tsundere

Yuki's cheeky stepsister
Often teases the protagonist
One year younger
A childhood friend and Yuki's sister by marriage; calls Yuki "Onii"
Has short telomeres and dies of natural causes about three years after the story begins
Long brown hair
Manager for Konkoku
Nicknamed "Chiha"

Manager of the Kaitaku baseball team
Has a great figure but a big butt
Has extremely sharp eyesight
Originally at Konkoku, but fell in love with the protagonist at first sight and came to Kaitaku ahead of him to become the manager
Childhood friends with Tsumoi, who gave her the nickname "Busae"
Speaks in a girlish way, ending sentences with "yo" and "nano"

A tomboyish and level-headed personality
Belongs to Kaitaku's kendo club
Feared by others, but she's actually a very pure girl with zero romantic experience
Black hair in a ponytail

An extremely, extremely, extremely clumsy girl
Cheerful but surprisingly shy
She never messed up when it came to basketball, and more than anything, she loved it because it was fun
Best friends with Yurari, and calls her "Yurari"

A member of Konkoku's basketball team and a player who could aim for nationals.
Midway through the story, she injures her right arm, but keeps playing basketball anyway—as a result, the bones in her right wrist are completely worn away, she can no longer play basketball, and she gets cast down to Kaitaku

Asami's best friend since middle school
A basketball genius on par with Asami, holding the official record for three-point shots
Has an elusive personality and suddenly shows up out of nowhere to tease people
Loves to tease
Calls Asami "Asami-chan"
Speaks politely to everyone

An heiress of the Ichinomiya zaibatsu
Acting chairwoman of Shin'ou Girls' Academy, which was absorbed into Konkoku High, and works to make Shin'ou Branch independent again
Shin'ou is a school run by the Ichinomiya zaibatsu
Speaks in an ojou-sama manner
Has a serious personality and fully participates in dirty work like farming classes

The protagonist's granddaughter from the future
A 20-year-old college student
Lives a cheerful life
Carries the future protagonist's diary
Came to the present to learn the reason for the tears she saw the future protagonist shed when she was a child
In the world before the future Yasuko was born, a bomb called the "Peacemaker" exploded, causing the "Catastrophe"

A lively girl from Kaitaku
Childhood friends with a boy named Kyoichi Mikage, and calls him "Kyo-chan"
Very weak in the morning and gets woken up by Mikage every morning

Near the end of the story, she becomes the cheerleading captain