Rachel is SUCH a girl's girl and I swear if I see ppl hating on her again- like she backed off THE moment she knew annabeth liked Percy, she didn't even have to do that since annabeth wasn't even Percy's girlfriend yet, so she isn't even obligated to back away. Since annabeth has no "claim" over Percy. But she did it anyway because she wanted annabeth to be happy, Shes genuinely so chill and never retaliated when Annabeth went all volcano on her.
One thing I like is how Rick made sure that Percy was NEVER mean to Rachel, or degraded her in any way. There's this thing I've noticed where writers make their characters criticize the female rival in the love triangle to uplift the main love interest. Rachel IS a cool person, and Rick made sure to acknowledge that, by making Percy admit that shes pretty and cool, Tyson calling her beautiful, etc. instead of making her behave badly so she simply exists to make annabeth look "cooler". Which is something, he unfortunately did with Piper and Drew. Making Drew a stereotypical mean girl to uplift Piper and make her look better.