Not crazy at all. Whenever I see a cosplay of male Junko, I see the vision.

(I'm going to assume it isn't a "He chooses not to come out at all, for despair reasons," thing. That does sound like something he would do, but it also wouldn't give me much to talk about.)

(I'm also going to assume this is a world with absolutely no political or social stigma/bigotry around transness, because I feel like it would be in poor taste for me to include that as an axis of despair. I'm bringing this up because, in a world where there is that kind of prejudice, Junko would certainly play with that in some way.)

Transmasc Junko gets really close to Chihiro. He frames it as a solidarity thing, but there's definitely a "forcibly outing her/them" vibe to it. Other than that, it's a pretty wholesome friendship. Junko is ruthless to anyone who's mean to Chihiro.

I feel like Transmasc Junko would be more into styling Mukuro's look. Like, "You're Girl Me and I'm Boy Me." I think Mukuro probably just likes the positive attention from her brother, but if she ever does want to express agency over her appearance, she will be running into full Junko putdown behavior. Junko might make her get the Fenrir tattoo removed.

One day, Junko comes out of a simulation like, "Can you put yourself in, next time, so I can kill you? 😍"

Chihiro, who by this point has long past reached the conclusion that Junko has a disorder that causes her to process emotion differently, just looks mildly confused and replies, "You already have Alter Ego."

"That's just a tutorial with your face on it! I want you."

Chihiro codes more accurate versions of themself into the simulations, as opposed to Alter Ego's combination of Chihiro's basic mannerisms and its own role as master of the simulation.

Junko keeps begging them to enter a simulation with her themself, but they're too scared. Maybe on Junko's birthday they try it.