The pink period of my school life was a complete deception

The main characters of the anime "My Pink School Life Is a Total Deception" (Oregairu):

Hachiman Hikigaya is the main character and narrator, a withdrawn and cynical high school student, he is a misanthrope and a genius of mischief, constantly quarrels with Yukino, he has black hair;
Yukino Yukinoshita is a smart and reserved girl, one of the key members of the volunteer club;
Yui Yuigahama is a cheerful and outgoing girl who helps smooth things over between Hachiman and Yukino. She has pink hair.

Shizuka Hiratsuka is Hachiman's teacher and the head of the volunteer club. She combines strictness with a sincere desire to help her students, and is constantly upset that she has never married.
Komachi Hikigaya is Hachiman's younger sister; she is very caring, tries to support her brother, and often gently pushes him to change.
Saika Totsuka is a gentle and kind boy with white hair, who is often mistaken for a girl due to his appearance. He really wants to be friends with the main character and also loves playing tennis; he participates in club activities and is good at sensing others' emotions.
Hayato Hayama is a popular guy at school, one of the most outgoing and friendly students; his attitude towards others is in stark contrast to Hachiman's view of the world, blond.
Iroha Isshiki, a student who later becomes student council president, initially appears frivolous, but is actually very diligent and stressed about her responsibilities.
Yoshiteru Zaimokuza is Hachiman's friend from middle school, eccentric and obsessed with the idea of ​​writing a great work; he often gets into comical situations, and like Megumin, he lives in his fantasies and wears glasses.
Yumiko Miura is Hachiman's classmate and Yui's close friend; she is straightforward, sometimes abrupt, but genuinely cares about her friends.
Hina Ebina is another classmate, quite emotional and impulsive; she often reacts violently, but not out of malice; she is an ardent yaoi fan and will not hesitate to ship guys.
Haruno Yukinoshita is Yukino's older sister; self-confident, mature, and calculating, she significantly influences Yukino's decisions.