So was Fenchurch telling the truth?

From the Traveler Mask:

"Such simplicity. Such contours! Been inside the Traveler, you know. Smells faintly of vanilla." —Fenchurch Everis

From the Sundered Doctrine helmet:

But It recoils, slashing the vanillin air with the edge of many hands.

& Warlock class item:

Anxious motion fills the stale vanillin air.

So, like. Sure seems that he got in there somehow.