I plan to keep my conversations with this person to a minimum and not disclosing personal information around him

Yeah, I think you’re right. It’s what I do.

How would you deal with such a character?

It’s at work so stay polite and professional. Keep your conversations work-related and positive (not overly cheery). Don’t say anything bad about anybody or anything. Basically, keep doing what you’re doing.

Who knows what this guy’s motivations are but it sounds like you’re pretty good at reading people. Good luck.

DIY hoodie https://www.popsci.com/technology/camera-shy-hoodie-privacy/

These glasses are pricey tho, so maybe DIY based on the hoodie https://www.reflectacles.com/#home