Satata's Younger Brother is a quest in Xenoblade Chronicles. It can be received from Satata in Colony 6. Completing this quest will unlock Rest in Peace. If Shulk is in the active party, he will comment.
"Satata's younger brother's keepsake has been found. His memory has been honoured."
- Shulk: "It's no good if it's locked away in some stuffy old room."
- Satata: "Friends sound like older version of Hom Hom Juju! Friend understand this old Nopon! It's as if memories of my brotherpon are disappearing!"