James has an older sister who he is very close to, so I guess that's a factor as to why he bonds with Taew so well. I am not sure if Taew has a younger brother.
I am sure he knows that Taew has a boyfriend. I think he posted something about the two of them waaaaay back in his IG. So one of the reasons why JT works is that from the get go, it's clear there's no offscreen Koojin thing going on. They're close like siblings for realz. That's offscreen. on screen (or on scene, rather) they are like soooooo sweet, based on the BTS so far.
James and Taew also worked together a lot in AIS promos, same with Toey.
I think since they've been shooting for a full year, every day for several weeks for Game Sanaeha and Nueng Dao Fah Diew, they're bound to be really close. There was a time when shooting had to be postponed because both James and Taew got sick. They are that close; they share viruses
I don't know if anyone has seen or remembers that time when James and Great were being sweet in the rehearsals for the Ch3 Charity Concert last year.
The reason why James was sitting on the floor was because Taew came and there was no seat so James gave her his seat (beside Great) so Taew can sit. He can be such a gentleman and such a baby at the same time. Lol.
Admittedly, i wasn't really sure if I would like Taew and JamesJi when they first announced that they will have back to back lakorns together. But now I am convinced these two may possibly be one of my favorite pairings.