[You walk in on your brother staring dreamily toward the sunny sky while he's on break.]
(With an amused tone)
"You're quite quick with getting things done. Quite the hard worker you are."

[You're musing with your brother on how far the both of you had come.]
(With an insightful and caring tone)
"Hey, we wouldn't've come this far if we didn't have one another's backs. I thank you for keeping me going, brother."

[You're chatting with your brother after he helped Nebula Spectacle through her problem]
(With a hint of pride and )
"You did good, brother. Nebula's a great student and support is what matters to her."