That's what I was thinking too ლ(´ڡ`ლ)
I feel like the personality difference is because he feels more comfortable being extroverted in his dreams and that when he mentioned Tatara's stories that it was the ones he heard via dream world (or he's a fan of his films, but I'm hoping it's the former)
Well, I read someone else comments and they were both lucid dreamer
"seme watched one film about uke & it was love at first sight(ofc it is), admires & like uke sm but dk how to talk to him. so he tried to have uke in his dream(tried putting uke's pic under his pillow LOL) and somehow it succeeded, thats how the dream starts"
The comment I read
also why do i feel like gaku is also a lucid dreamer, and thats prob him in tatara's dream