Bertie has probably screamed at least once upon seeing Charon. I'm sorry Charon. (But once he gets over it, he's good for chatting at even unsociable people.)

And Narvin is another really damn old grumpy workaholic who appears to barely sleep. (But his poor social skills range somewhat towards the "offending people and making enemies" side rather than just grumpy and unsociable, so it's a toss up whether they could be grumpy bros or if throwing their grumpy selves together would just lead to mutual dislike.)