Effie starts the team building by telling Peeta and Katniss that once they are in the arena Haymitch is all they’ve got, which influences them to try and pull Haymitch’s head out of his ass. Effie is also the one that brings the “presentation” aspect of the games. She gives to the District 12 team despite not being treated very nice/respectfully by Katniss in particular. Effie talks them up to people she knows in the Capitol trying to win them sponsors; she even says she’ll get Haymitch to the sponsor tables at gun point.
Peeta’s kindness is a trigger for Katniss, she even says that it’s a danger to her. She tries repeatedly with all of the team to not connect. Whenever Peeta shows kindness she tries to convince herself that it’s an act to make her vulnerable. Katniss, even admits at one point that she’s only a survivor because someone (Peeta) helped her.
Cinna tells Katniss he chose her, chose District 12, implying she impressed him by volunteering. She also recognizes that he’s set her up to survive by making her the girl on fire. Cinna tells her to address her answers for the interview to him, to think of him as a friend. There’s Cinna getting the pin for her.
Haymitch pushes them to be together and amiable in public. Haymitch tries to help her strategize but she’s so resentful, she can’t help her hostility.
Katniss spends so much time trying to convince herself that she’s alone, that Peeta is always trying to play her, that he’s her “bitter adversary”
There’s Rue helping her when she’s tracker-jackered. Then their alliance.
Time after time her team helps her, even when she would have declined.until the scene with the berries, then she knows it wasn’t fake, that only by standing together --even if they die-- can they give a big eff u to the Capitol.