Just want to talk about Agustín and Bruno because they probably had an epic bro relationship before Bruno left.

The biggest implication for this is the scene when Agustín finds Mirabel with the jade square. The way Agustín reacts implies that he’s also clearly familiar with Bruno’s bad reputation and knows how the rest of the family, especially Abuela, will react to the square. But there’s no evidence that he ever treated or viewed Bruno according to that bad reputation - instead, when Agustín shows up to help set the table in We Don’t Talk About Bruno, he’s the only one who doesn’t join in on the singing. He was probably one of the few people who recognized that Bruno didn’t cause bad things to happen; Bruno just happened to see a lot of bad things.

Bruno and Agustín also share a lot of similar traits. They’re both somewhat clumsy/uncoordinated, have bad things consistently happen to them (Agustín, physically; Bruno, reputation-wise), and are very caring and protective about those they love.

He felt close enough to Bruno to include himself in the triplet hug when Bruno returns. It’s possible that Bruno and Agustín spent a lot of time together, especially if Bruno hung around Julieta when he wasn’t hidden away in his vision cave and when Julieta was home.