Becker is the colour of rosewood.
It's a very wonderful colour, one that Connor rather likes. It is a rich, dark reddish-brown that's just somewhat lighter than mahogany, with undulations of darker russet striping through it like ripples on a pond, and it always reminds him of his granddad's old chessboard and all its pieces carved out of rosewood. It is solid and strong and just like the man himself.
When he first met the captain, Connor was outwardly sceptical but inwardly impressed because it takes a certain kind of unshakeable to be able to face a prehistoric crocodilian the first day on the job and not run screaming for the nearest psychiatric hospital. Becker was the very image of the spit-and-polish soldier boy, Mr. Action Man, with his neat hair and uniform and Mossberg, ready for action at the drop of a hat. He was the kind of bloke that Connor could see surviving the zombie apocalypse or an alien invasion because nobody that badass is about to go down easy.
But that's not all there is. There's a temperance to him as well, a hidden softness buried well beneath his toughened outside. Connor can see that in the ripples of warm garnet that flow beneath the rosewood, Mr. Action Man Captain Becker is a dyed-in-the-wool romantic, and just because he had terminal foot-in-mouth disease didn't make it untrue. He has a sense of humour, though it's just as hard to find as his romantic side. Connor thinks of Becker as a rosewood box, showing only the smooth outside and encasing everything else inside. It takes weeks of working with him to catch glimpses inside the box, to see flashes of Kelly green and watermelon pink and pastel turquoise, find the actual Becker beneath the Captain.
And loyal. If nothing else, rosewood is loyal. It is solid and firm and cannot be bent or twisted. Connor doesn't hold all of the soldiers in high regard, but he trusts Becker to protect the team above all else. When that crazy bat Christine Johnson tried to take over, all frozen peacock blue and icy asteria, Connor never doubted for an instant just whose side Becker was really on, not even when he had a gun trained on them and was threatening to use force if necessary. Rosewood is loyal. The only reason Connor had been able to stand the idea of running off after Helen on some wild treasure trail through history was the knowledge that Becker was going to stay behind and look after things in their absence. When he came back, he wasn't surprised to see Becker still there, holding down the fort, even after the loss of Sarah had left a terrible crimson scar in him. Even now, he knows that he can count on Becker to keep the others safe from Burton and Prospero if Connor can't manage it on his own.
Connor trusts him.