I'm gonna put this out here before he dies

He almost choked on a pretzel

That he can sense inkstone/brimestone better than others. Due to being around it often I imagine he'd be more aware of it, and would likely be able to sense bloodstone in the same way

That works

Xander when WS inkmatas shows up:

After whatever amount of years old he is, he still doesn’t have the Terraprisma

If he has beaten all of the Calamity bosses (except AEW) then he can beat daytime EOL

Headcanon 2: He is secretly breaking the laws of reality in order to gain more knowledge (he checks the terraria wiki)

Nah

He is friends with the Collector

Pretty sure that's already canon

He likes cheese

he has a tomato addiction

No

he still has a grudge against Eggy about the hot-pocket incident

He still does

Eggy: I TOLD YOU THAT WASN'T MY FAULT!!!!!
and I already feel bad enough about it... *he starts tearing up a bit*

The purple shield represents loyalty.

I'd say yes

Is there a “but” or no?

Nah
The Ankh shield would represent loyalty and determination

Okay.

He was one of the last people killed in the True Genocide timeline, and one of the few that resisted

He knew 185 and called him a "Scottish Drunk."