Halfway through the Water Temple, and the Light Dragon drifts past. Proceed to chase after it for half an hour for upgrade materials, come out of it with the Master Sword. Sidon will definitely understand that detour.
"ENOUGH IS ENOUGH!" *proceeds to call out Sidon over being paralyzed by her fear of losing her like he lost Mipha, then reassures him they can hold the line while he helps us.*
I thought I loved Yona already, but dang, you go girl!