Joshua listened to Yen Sid, his initial reaction one of disappointment when the Master said he could not help him with this matter. He listened again though when Yen Sid said there was someone that could and said person entered thee room. When Joshua turned around, saw the man, and heard his name, Joshua's jaw could've dropped to and through the floor. RIKU! As in the Master Riku, the Warrior of Dawn from the legends and Sora's best friend (after Kairi of course but that was like comparing Joshua's relationship with Amaya to his relationship with anyone else they knew). Joshua managed to recover from his shock fast enough to hear that Riku would train him in the castle's basement. Joshua bowed to Yen Sid and gave him his thanks before following Riku downstairs and watching the Master open a secret entrance. Before following Riku, Joshua turned to Ascot and Amaya and placed a hand on their shoulders
"Please, wait here both of you. This is something I want to see through on my own." he said before following Riku down. When they arrive he saw Riku pull a blanket off something, which was revealed to be a mirror, which he moved to stand in front of and examined" I'll go out on a limb and guess this is a special mirror?"