Chaser

Chasers are a recurring enemy in The Legend of Zelda series. They are very similar to Blade Traps, only with the capability to chase Link if he runs across their path. They are also somewhat slower than Blade Traps and will not return to their original position, but rather stay where their attack ends.

The Legend of Zelda: Oracle of Ages & The Legend of Zelda: Oracle of Seasons
In the Oracle games, these enemies appear in dungeons, waiting to strike Link if he crosses paths with any of their cardinal directions. They often appear in narrow hallways, making them harder to avoid than regular Blade Traps.

The Legend of Zelda: The Minish Cap
"Appears in dungeons. They move quickly to chase you once they spot you. Your shield will block them, but keep on your toes!" -Quote from Minish Cap Figurines In The Minish Cap, Chasers are very similar to the Oracle version of this enemy, chasing Link whenever he gives them the opportunity.