I have a similar coworker, was constantly coming by and trying to start up conversation. Asking what I did the weekend etc. Why I don’t like their pears etc.
Finally one Monday morning when they came by wasting time I pulled off the headphones and asked "do you have a work related issue you need help with? " their response was “no I’m just socializing” I responded with something implying they’d actually be good at their job if they did that instead, and I’m not now or ever interested in socialising with them. They finally buggered off.
Woohoo $0.50/person in the USA, to fuck them all.