Hector appears to be a very caring father and grandfather, and is happy whenever his family comes over. He is very impressed with Bobby's ideas for how to run a store, and is more than happy to let Bobby take over the bodega in his place. He likes spreading gossips, but denies this whenever Rosa scolds him for that. He considers gossips as more trustworthy source of information than newspapers.
He is an overprotective grandfather ready to spy and track his grandchildren.
Hector is also very imaginative as he instantly assumed that a rat ate Ronnie Anne. He also claims that he is where CJ got his imagination from.
Hector isn't very intelligent, because he makes stupid mistakes like confusing his clothes with clothes of Carl and Carlota, or the aforementioned assumption that Ronnie Anne had been eaten by a rat.
He is a short, round man with tan skin, black eyebrows, a thick, bushy gray mustache, and gray hair at the sides of his head. He wears a tan shirt with an asparagus green jacket, that has patches on the elbows, olive green pants, and black shoes.
Carl mistakenly believed that the ticklish spot is actually his armpit in that same episode.
"Battle of the Grandpas" reveals that he is strong enough to hold Lalo, albeit for a short amount of time, that he used to be a bull rider, that he can rap (but not very well) and fish, and that much like CJ and Carlitos, he can tolerate very spicy-tasting food. According to Vito, Hector can also eat a bowl of cereal off his belly with no hands.
"Walk Don't Run" reveals that he likes to nap in the park, and that he pays Carl five dollars to walk Lalo.
"Fast Feud" reveals that, due to living in Great Lakes City, which can be noisy at times, his whole life, he is a heavy sleeper.
"Face the Music with the Casagrandes" reveals that he has bunions, and that he used to have stage fright as a child, because he fell over during a first grade play, and a man in the audience shouted, "Viva que?!".
"Grandparent Trap" reveals that he wears a pair of shorts (that he thinks shrank, but Rosa thinks he got bigger) as underwear, that he keeps food in his shoes, and that he likes to sleep on the couch as it's near the kitchen.
"Señor Class" reveals that he has worked in stores since he was a preteen, and "Bo Bo Business" reveals that he has worked in the store he works in now for thirty years.
"New Roomie" reveals that Vito is his oldest friend.
"Fool's Gold" reveals that despite his age and size, he can climb up buildings. It also reveals that the contacts on his cell phone are Rosa, Vito, Sergio, Stanley, Becca, Par, Mrs. Kernicky, Mr. Scully, and Maybelle.
"Taco the Town" reveals that he has bad aim and can neither fix a toilet nor bake.
"Achy Breaky Art" reveals that he doesn't like to talk to others in the mornings, preferring to read the news instead.
"Who's the Loudest?" reveals that he likes it when the circus comes to town, since the performers always buy from his store.
"Bend It Like Abuelo" reveals that he has a pair of underpants with jalapeño peppers on it that brings him good luck.