Eb
Eb has been married to Flo for most of his adult life. They have adult children who don't live nearby. He and Flo are both around 60.
Though he pursued degrees as he got older, Eb was self-taught at various tech jobs: graphics design, computer programming in the era of mainframes and the early years of PC systems, but he holds only a certificate in programming. Eb has not worked in his field for some years -- lost his job in the era of the internet and the coming of Android and apps, etc. Something about the tech world now is not for him. Not long after he lost his job, he and Flo lost the house they'd lived in for 30 years -- they had been forced to do extensive repairs to the place and had run up some bills they then couldn't pay.
Eb complains about his legs. It's not clear whether he knows he has something crippling like a neuropathy or not. If you were to point out that he had a medical problem that might end his life and there was nothing he could do about it, he'd probably say, "You just watch me!" He jokes about hair in ears, etc., and a part of the body already returning to the earth, to the whole, to the junkyard. He jokes about carrots growing in the eyebrows but this is way better than what some of his contemporaries face.
In the second half of the show, Flo begins to show signs of dementia. Eb is one of those guys who seems to not notice, but maybe he's just trying to deny it, partly because their relationship was always about Flo taking care of him (she's the homemaker type). He doesn't have a clue about how to care for someone like her -- or anyone else. He might try to devise memory aids, notecards, google glasses on which he types things for her to say.
At the end, we might figure that Eb is not going to be able to take care of Flo -- all of a sudden he shows compassion, but after a bit, he realizes he's can't truly care for her. Something like google glasses, etc., might have been more like ways to eliminate the problem for himself. He just doesn't know how to care in the way Flo needs now.
Eb often is seen reading the paper in the bar. He doesn't drink.
Eb wears the kind of clothes you might see on earlier generations of tech workers -- it's casual business attire: khaki slacks, a sweater over a collar shirt, brown socks, brown loafers.
Toward the end: when Eb breaks down after finding he really has a problem: "The time I have left is not the time I want."