Number Three often gets mistaken for Royal Guard #4.
Number Four can be seen in the castle along with Royal Guards #1-3 when they asking Graham for commands and proclamations shortly before Graham was kidnapped by goblins. Though Number #4 does not speak.
Behind the scenes Edit
Assuming the unnamed guard with Numbers 1-3 is not Number Four, he could also be the one guards from Chapter One known simply as the Royal Knights.