I DO have thoughts!

I think the people who are most possessive in the band are Baekhyun, Junmyeon, and Jongdae.

Junmyeon is a bit unhinged about it on main. He sure seems to believe the Exos are His Exos. He used to be way more explicit about this when they were younger. [fondly remembering him saying: "you're mine, MY Baekhyun" and Baekhyun saying "We're all Suho's." and "his Sehun, in his little cage"] Junmyeon only recently stopped being this insane on main, and I think mostly because they've not been together on camera enough for us to see it XD The most we see of it nowadays is his obsessive streak in tracking all of their activities at all times even though he's too busy to sleep.

Baekhyun, also, is very possessive of His People. He's protective and obsessive almost as much as Junmyeon is, but is a bit more invested in not broadcasting it. He also enjoys very much when any of the rest of the Exos shows a spark of possessiveness over him. I think he finds it soothing to consider his people to be an unbreakable unit, which is what makes him so clingy.

Jongdae is the one most invested in being normal about his possessive urges out of the three. We rarely ever actually hear him say anything about it. But we can see it in his reactions when it's challenged. For example, the first time Chanyeol claimed his place in CBX, Jongdae's face went a bit unhinged. That is HIS CBX. He did turn it into a joke immediately! But his reaction at first sure was genuine! See also: the great Xingdae divorce of 2015, which is rumored to have been about Yixing making close ties in China, which threatened Yixing's place in Jongdae's pack. He just gets a bit unreasonable when something or someone that he perceives to be HIS has its place threatened.

Honorary mention for Kyungsoo, the member who openly admits to being bad at relationships because he gets unhingedly jealous, which is not quite the same thing as possessiveness, but is close enough to count as a bonus.

Thank you for telling me you like my writing, anon 🥰 and for the well wishes <33333