I'm looking for the name of a book series I read when I was younger (maybe early 2000s?) that follows a family of very long-lived wizards/magicians who live in a tower in some sort of secret grove and watch human society evolve from a distance.
There are multiple books, possibly each one following a different wizard/generation of wizards. I think one of the main characters is a woman who dresses in blue.
I think the opinions of the common people towards magic change throughout the series, but definitely at some points they're feared/hated/persecuted and have to hide their identities when they go out into the world.
One of the early novels might follow a human man/boy who meets a talking cat (possibly one of the wizards in disguise) which helps him unlock his magic powers. I think there's a scene where he's defending a castle and uses a spell to multiply his breath into a gale that blows away attackers.
There's a scene about the trees in the forest around the wizards' grove. They dive into the tree's minds and see their slow-paced long-term view of the world.
The wizards might worship, or even be servants of, some sort of god that lives in the grove with them.
Near the end of the series they have a confrontation with an evil uncle who lives in a cave or something.