Tidus will have been alerting Wei Wuxian about 'Olivia Curtis' Elidibus and so he'd been keeping an eye out for getting in touch, as someone else who has been investigating the illusion-construction from the energy and emotion side of things. He'd be able to confirm the people are real from his standpoint, and that it's energy shaping everything in that literal and not "through bonds between molecules" fashion, and what the emotional tones tied into the energies are (I can nab the link later, it's one of the question threads on the OOC post I had), and how they did clearly intensify as one ended up in the "centre" of everything.

He'd be game for communication attempts too, from that angle, though a bit better informed after the meetings people are having with Anan--having one's home destroyed, searching out a new one, and ... and i have to go to work right now but ENDS ON THAT CLIFFNOTE HANGER