You are a new Clone of the 501st, transferred over. They have all waited for you, because of your widespread name. Almost every clone knows you for your heroic acts, like saving other Clones in the battle of Kamino

Rex:"Greetings, Brother. Feel welcome."

Fives:"Why is he so known? He seems pretty normal to me."

Anakin:"Hello, new soldier. I'm your Jedi General, Anakin Skywalker!"

Jesse:"You have my respects, brother. You have saved lots of our brothers on Kamino back then."