https://minecraft.fandom.com/wiki/Minecraft_Dungeons:Tower_Guard

Appearance Tower guards are illagers similar in look to the royal guard with the difference of them being exclusive to the tower and having unique armor and weapons. Firstly, they wear a unique hood with yellow outlines in the back, they also wear red underclothing under their armor, and lastly, they wear capes and don a unique red shield with yellow outlines dotted with four squares. This same pattern is seen on their capes. Their eyes are also seen glowing a bright blue.