Why Kira is on that swing set in the 3c promo...
(this is basically just a theory/analysis, I might be wrong)
Kira is shown to be a rather nasty person. Her personality contrasts to Cyrus' friendly and wholesome nature, so when Kira is on the swing set, instead of Cyrus, it shows the audience the difference in how they would act in the same situation (granted the viewers have seen Cyrus' swing set scenes). The audience would then probably decide that, compared to Cyrus, Kira is a bad friend to TJ. The audience is now rooting hard for Tyrus.
Now that the audience knows that Kira is the antagonist, she is going to be the ultimate challenge between TJ and Cyrus' friendship/relationship. Kira is getting into all of Tyrus' spaces and it shows how she is going to be the hardest challenge to overcome, like an soldier in their enemy's base. Her whole involvement in this story is probably going to be the pushing force that manages to pull them closer. (As in, "i'm going to push you apart, but when you rid me, you'll be closer than ever before")
She is also lowkey homophobic (as we've seen) so by BOTH of them noticing that she is a toxic person then BOTH of them getting her out of thier lives, this shows eachother that they BOTH don't condone homophobia. They would then BOTH realise that it is safe to come out to eachother.
So, no need to be mad. Kira is written to be a bad person so I highly doubt she would be prioritised over Tyrus.
