I think Patricia gets along easily with Reggie because his personality type is so common with nerds. Just sort of baseline irritated with everything all the time. So she knows not to take it too seriously. It’s misdirected anger almost all the time. Alex gets along easily with him because her best friend is basically the same personality as a girl, but turned up all the way.
Evrina & Reggie clash because they’re really similar. It’s kind of like in Futurama where whenever the characters met different versions of themselves they never got along. You get irritated more by the flaws you see in yourself.
I used to have a problem with my friends not getting along with each other because similar kinds of people always seemed to gravitate to me, but they didn’t like each other. It makes for a difficult sit down meal let me tell you. It kind of led to me having little cells of friends that were set up in similar groups that could get along, but couldn’t comingle.