It is not unusual to see Deuce defending Trey: he tells Sebek to not make fun of Trey during Halloween, tells Ace he was out of line for putting Trey on the spot with self-centered requests in a vignette, and when he is mocked by bullies during the Wish Upon a Star event he responds, “I don’t care what you say about me. But if you’re gonna diss Trey like that, then you and I have a problem!”
During the Phantom Bride event Deuce is reluctant to join the suitor group (“I don’t know the first thing about girls feelings!”) and Ace tricks him into volunteering by accusing him of abandoning Trey. Deuce declares, “Trey deserves to have his revenge. I’ll be the guy to deliver it.”
When he fails, Deuce tells Trey directly that he had been trying to save him.
Deuce says, “Trey is so knowledgeable. I can always go to him for help. I hope I can be like that someday,” and when Jack struggles during Halloween Deuce recommends that he consult with Trey: “He’s usually good for this sort of thing. He even looks over my homework for me.”
Deuce says, “Trey’s kind enough to let minor errors in judgment slide if you work to make up for it,” and tells him that he has “always had a kind older brother thing going on…You’re always calmly watching over us. I can’t even imagine you getting angry.”
Trey gives Deuce one of his spare Deuce brushes in a vignette (“Stuff like this is what I meant when I said you reminded me of an older brother”) and Deuce asks him about the correct angle for holding it while brushing his teeth.
Deuce mentions a time he had “a fun chat with Trey about cooking with eggs. We debated the best omelet ingredient and he taught me how to make a basic custard. I’ve never gotten to talk shop about eggs with someone before! That was a blast.” Deuce says that Trey showed him how to make custard.
When Trey gets a box of cookies and candies in a mystery bag during New Year, he invites Deuce specifically to join him for tea to share them.
Twisted Wonderland Reference Note 