Compared to everyone in my family, I'm really close to my grandma. I know that she already has had heart problems before (open heart surgery, twice). I also used to work for about 3 years helping out elderly people in their own homes, its another reason I'm close to my grandma.
My mom is almost always working (at her Hotel job) so I rarely get to see her, I work at evenings to nights. The only time I'm close to my uncle is during soccer tournaments. My younger brother and sister are almost all day playing on their PS3 so rare times I get to see them, mostly when my grandma makes food. So my main "soul companions" (as they say) besides my grandma are the pets: 3 cats and the ferret in my room, but ferret sleeps almost 15 hours a day, so when she's out we play. At least my grandma isn't alone in her room, she has 3 parakeets she got for her birthday.