Yale didn't have any sheath for the Space-time Judgment Sword, so it was possible to see it perfectly despite not being wielded.
Kermu was really scared of the reaction of his master due to Yale having the edge of the sword unsheathed; that was a huge disrespect for his master. Sadly, Kermu didn't think about the sword when they were on the way to the meeting room, or he would have told Yale to store the sword before meeting with the Clan Head of the Kurk Clan.
"That sword..."
The Clan Head was trying to say something, but Kermu interrupted him.
"Sorry, master. He didn't have any bad intentions, please forgive him and punish me instead."