Which book characters feel like family?

While many books have likeable, relatable, or even lovable characters, I find that only a rare few have characters so real that I feel not just like I've met them but like they are people in my life, relatives or old friends. For me it almost always takes a series, not just a one-off novel, to feel this way. Also, this isn't the same as "most realistic" characters (which can be a code word for selfish and depressing) — I'm asking about book people who truly mean something to you.

So I'm curious for you all, what books have characters that check all these boxes?

• round characters, psychologically complex
• you're invested in their relationships with each other as well as their individual well-being
• goes beyond feeling swept up in a romance, which is more common imo
• you may be annoyed or frustrated by them at some times, charmed or impressed at others, but in a way that feels real & internally valid
• each character has their own values that guide them
• if something bad happens to them, or if they act in a way that seems against their values, you feel genuinely upset or betrayed, just as if it was someone you know

For me the instant #1 example of this is the Vorkosigan Saga by Lois McMaster Bujold. I'm half-surprised I don't get Christmas cards from those people. (Winterfair tight-beams?)

From childhood, I also think of the HP series and maybe the Anne of Green Gables series.

Would love to hear yours if you have 'em. Especially, obviously, if you think I would like them too!