Describe a neighbour you know well

The neighbour I know best is a woman we've always called Co Sau, who has lived directly across the hall from my family for as long as I can remember — well over twenty years now, since before I was born, actually. She's in her seventies, retired from teaching primary school decades ago, and she has this habit of watering everyone's plants on the corridor whenever they travel, without anyone ever formally asking her to. What she's like is hard to summarise briefly — stubborn in small ways, insists on doing things herself even when her knees clearly aren't up to it, but also remarkably observant about people; she'll notice if you've lost weight or seem tired before your own family does. Our relationship isn't especially close in the sense of deep conversations, but it's dependable in a way that matters more, I think. When my mother was in hospital a few years ago, Co Sau turned up with food every single evening for two weeks without being asked, and waved off any attempt to thank her properly. I don't see her every day, and we don't really discuss anything beyond the weather and whoever's renovating their apartment this month, but she's the kind of neighbour you realise you'd genuinely miss if she ever moved, which, given her age, is something I try not to think about too much.