Chie Hoshinomiya/Relationships

She is not only known as a notable homeroom teacher of B-Class, she's also known to have a friendly and easygoing personality, thus, she is acquainted and well liked by many people of all ages, at least on the surface.

Sae Chabashira
Chie claimed that she and Sae are friends back when they were students at their old school. However, she may have been exaggerating as Sae denies they were ever close and even reprimands Chie for her intimate interaction and repeated flirtatious actions towards Kiyotaka. However, Chie disregards this and continues to do it, much to her annoyance.

In second Year volume 4.5, it was said that she still holds a vendetta against her for an incident that happened during their school life. She resolved herself to not allow Sae's class to reach class A after she personally gave up on her class abilities to accomplish that feat.

Tomonari Mashima
Tomonari is one of her fellow teachers, they don't have any direct interaction in the anime so the exact nature of their relationship is unknown.

Honami Ichinose
Honami is one of her students, they are on good terms with Chie acknowledging Honami's intellect and potential early on in the series. In return, Honami treats her with respects, and even turns a blind eye to her questionable mannerisms unbefitting for a teacher. She still considers her to be an eccentric person because of her frequent drinking and drunk habits during class but defended her from other students and came up the excuse that this is just the close chemistry to her class.

During the cruise, the two get a massage together and discuss the students of other classes they should watch out for and while Honami is put off by Chie's erratic behaviour, she seems take the advice of her teacher about watching Kiyotaka seriously as someone who could be their more dangerous foe. However, after Honami many failed leadership experiences during tests against other classes, she began to harbour doubts in her abilities to overtake class A.

She respects her in her capacity as a student and recognises that she an exceptional individual, diligent and kind but is also someone naive, inexperienced and gullible, falling short as a leader and would be the one determining factor of either their class succeeding gloriously or failing spectacularly. She also knows Honami's strong infatuation and crush on Kiyotaka and has taken many steps in trying to induct and persuade him into joining their class, believing that he is someone who will elevate Honami and allow her to be at her highest potential, as well as overtaking Class A. After Kiyotaka repeated rejection, she began to lose hope and starts to view Honami in a more distrustful light, after she repeated failed to defeat the other classes. She openly complains to the other teachers that at Honami current state, it would practically be impossible for them to reach Class A and openly admits that she has given up on them, saying that her class has never fell to C before, making this the first time under Honami's leadership. When Kiyotaka scolded her for not doing her role in helping her class, she got angry but did not deny his statement.

Kiyotaka Ayanokōji
Despite not having any interaction in the anime, it appears that Chie had suspicions about his intelligence. This was seen in a talk with Honami where she recognized him as a person from D-Class to watch out for the most.