It is my personal belief (idk if this is obvious or even confirmed) but I'm pretty sure Bastion is connected to the titan Pantheon. I'm making this up on the spot so you're gonna be watching my thought process in real time while reading this here we fucking GO:

-arcane magic appears heavily in bastion (there are plenty of buffs throughout the zone that increase your arcane damage and covenant abilities), and arcane is just as prevalent w the titans because it's supposedly order manifest

-I'm pretty sure the spirit healers seen since vanilla have been confirmed to be kyrian, and the ONLY OTHER time another being actively thwart the onset of death was Eonar during the Argus fight

-this one might be a stretch but the architecture is undoubtedly similar. One could argue that this is the design of the 'First Ones' who are supposedly higher than both the Eternal ones and the Pantheon (*cough* but who's to say the Eternal Ones aren't the Pantheon)

...actually that brings in the question-*could* the titans have ordered death/created the arbiter/all that jazz? Arguably the Shadowlands' opposite, the Emerald Dream(the realm of raw life) was supposedly Eonar's creation (through Ysera) so it isn't beyond reason to say Titans

aren't incapable of working with things outside of the confides of their reality. I'll probably continue this thread later but if anyone wants to step in and tell me to shut up or I'm a nut freaking out over the obvious or to get on meds I'll probably be inclined to believe you