Season 2

BlueJay was basically an independent player, they created the 'void drills' that mined bedrock for antigravity.

Season 3

In S3 BlueJay joined the Aztecs, and built a floating sky archipelago.

Season 4

In S6 BlueHay only played for a short time but left early on.

Season 7

BlueJay was part of the Mafia in this season and designed the entirety of the mafia mega base on their own. (They have a ton of pics of it on an old build world.)