Arthur

Arthur Achilles Sigmund Sigurd Georgios Diarmuid Heracles Perseus Alexander (TBA, TBA) is

Appearance
He looks similar to his mother.

Plot
He is rising up from the lake within the Palace after swimming for days while getting lost, he then sets up the picnic since he was starving. Then Lanteveldt ties him up much to his confusion.

After getting the ring back after it fell in the river while they were looking for a place to watch the king. Sariphi then present him to the king as a reward for bringing back the ring much to his shock, when Leonhart asks him what he wants he says he wants him to give him a handshake.

Trivia

 * His appearance in the anime was skipped over in the adaptation.