(Occasionally it's the dog.)
As new characters enter the Charley Manner series, I try to contrast their quirks with the MC's. Vicky, the female DEA agent, is tough but still plays damsel-in-distress waiting for help from the big, bad Navy SEALs. Not that she isn't performing a rolling karate-kick move like I have seen Gyppo's France execute when necessary. Adding females (as I mentioned, Vicky the DEA agent, and earlier in book 1, Charley's older sister) has helped me expand the dialogue, banter included, hopefully in a meaningful way.
While developing DEEP STRAIT, it occurred to me that Charley's Military Working Dog, Spirit, should have a broader role. Yes, you might have guessed, Spirit is a female Belgian-Malinois, fearless and loyal. And very smart. I have written several scenes from her POV and reader feedback has been positive. Who does not like a dog in a story?
BTW, I recall a note of advice from Alice from Dallas, our departed friend who is sorely missed: I had posted an opening scene from Hellhole in Khyber where Spirit is wounded when the SEAL team is ambushed by Taliban fighters. She advised, whatever I do, do not let Spirit die. Hmmm, Old Yeller from a Disney film I saw as a young boy was so traumatic. So no way will Spirit die in my stories, except from old age eventually.
Funny how our characters help us weave our tales, errr, tails? Well, you know what I mean.