Haknyeon and Juyeon don't really interact together much, but in the newest come on tbz, you can see how funny Juyeon finds hak. And on a side note- Changmin and Hak have been trainees together for much longer, so it's obvious how close they are to each other because they've seen and been through so much together. You can tell how comfortable they are with one another.
About Juyeon with Haknyeon I like that Juyeon is one of the members that encourages him to sing, like in the kingboard video or in the godsaeng series (in godsaeng I actually thought he was Haknyeon's manito for how many times he asked him to sing)🥰
11:18 Sunwoo looking like a fresh and blooming bride who's latching to husband Haknyeon! Sunwoo should be the one holding the bouquet! I can't! Bwahaha! It's so cute! 🤣🥺💖
Its true he doesn't Interact on camera that much with Juyeon, but like Eric and Sunwoo he also confessed few times that he loves Juyeon and he's his favorite member. It doesn't come as a surprise since it is known that Juyeon in Tbz was pretty much their parent and even other members said so