Let’s be honest here, I would make such a shitty companion.
As luck would have it, here’s something Tegan and I prepared earlier along these lines:
…because while I have no doubt that Tegan would make an awesome Time Lord, the Grumpy Cat-esque expression I’m sporting ensures that I would fall under the ‘lousy companion’ category.
(This was taken at Tegan’s work on the 23rd November last year. Yes, the date of Doctor Who's 50th annversary.)