I have with Tomo. They're not completely set in stone but what we have so far:

• Arthur/Goro: AKA mini Marth that's too smart for his own good and beats his father at chess (but not his dad rip). Oldest and therefore heir to the throne, but he wants to become a detective instead (and earns the longing looks of his dad).
• Rin: AKA mini Ren. Hyperfixates on the old legends of both Japan and Archanea and is an all around menace. She's quite immature but tries really hard to grow into her role as a royal and takes her studies in politics/history/etc seriously (despite getting middling to above average grades much to her diismay).