I mean that last bit is a big jump. I don’t think any amount of charisma would help a candidate in the debrief if they did poorly on the technical segments. Where it can help is for more junior folks who have gaps, and what you’re trying to sniff out is how hard the person is going to work and how teachable they’ll be. Or, depending on the job, it may be a minor factor for someone applying to be a manager or work in HR, since the people skills are actually one of the important points of that job.

But if the most charismatic person out there interviews for an engineering job and can’t code, that debrief would take two seconds, and sound like, “Man, X sure was nice, too bad they can’t do the job.”