From the Legend of Zelda: Breath of the Wild. Image from Nintendo Switch version taken by C. Wassenaar and via Nintendo.
14. The Master Sword … Speaks?
As you collect more memories, you’ll hear Princess Zelda mentioning that the Master Sword has a voice, and that she can hear it. In fact, it’s a minor point that Link supposedly cannot hear the voice. He doesn’t confirm it himself — Link doesn’t talk, since it’s rather a rule of the series — but we’re clearly meant to take it as true.
Yes, the Blade of Evil’s Bane, or, if you prefer using Breath of the Wild’s name, the sword that seals the darkness, does speak in a little game called Skyward Sword. Actually, the spirit of the blade is Fi, your companion for that game. At the end of Skyward Sword, Fi says that she will rest within the blade. Presumably the damage done to the Master Sword in the events prior to the main game of Breath of the Wild woke her up, or Link’s drawing the sword out of its pedestal did the same.
By the end of the game, though, even though Link can still have the Master Sword, Zelda will say she can no longer hear its voice. Presumably, with the crisis averted and the Master Sword back in the hands of its rejuvenated hero, Fi doesn’t need to intervene anymore.