Huyang

"From the Battles of Rashfond, to the Peacekeeping of Parliock, to our very own Clone Wars, the lightsaber is a Jedi's only true ally. But how do they work? Hmm? Yes, you have brought me crystals, but they're all useless you give them life. Do you know how to awaken the Force within the crystal? No? Then I suggest you listen and learn, until you think of a question this droid cannot answer."

- Huyang, to a class of Jedi Younglings

Professor Huyang was a masculine-programmed Architect droid who guided the Jedi Younglings in the construction of their lightsabers.

Behind the scenes
Huyang was voiced in Star Wars: The Clone Wars by actor David Tennant, best known as the Tenth Doctor in long-running science-fiction series Doctor Who. He won an Emmy for his portrayal of Huyang.