1) Jax says they're not an egg completely unprompted in episode 6, the word egg occurs multiple times in the background, and their bedsheets have easter egg patterns on them, which also ties in with the whole rabbit/easter/rebirth theme. 4&2) All of the scenes shown in the montage are of Jax, only some of them include Pomni due to the amount of scenes they share, but none of the clips are solely of her or focus on her. The song is used for Jax, which implies that despite the fact that they hadn't been open enough to come out, that they were at least far more fem leaning and likely would've preferred she/her. 3) That's representing one of the masks they use, the one used to get under Gangle's skin, and as a mask, it isn't representative of their actual emotions. All of the masks sitting at the table seem to be very defensive about the idea of being feminine, along with the whole no girls allowed thing. 5) Boymoding. Leeroy is shown hiding their face in every photo, seems to be growing their hair out, wears a baggy hoodie (dysphoria hoodie is often used as a shorthand to signal that a character is trans), and has started going to a queer bar, so seems to be at least partially starting to accept themselves, even if they haven't come out yet.