Guardian (Breath of the Wild)

Guardians are enemies in The Legend of Zelda: Breath of the Wild. They are a group of mechanical enemies, all sharing a similar design and being products of the ancient Sheikah tribe's technology. They were originally programmed to defend Hyrule. However, upon the second rise of Calamity Ganon, the beast corrupted and took control of all the Guardians, turning them against Hyrule as extremely hostile beasts capable of ravaging an entire town alone.

List of Guardian types
There are several variations of these enemies:

Guardian Stalkers
The Guardian Stalkers found across Hyrule landscapes are large, mechanical spider-like creatures that remain inactive until Link approaches. They can fire energy beams from their eye. This energy beam will explode upon impact. If timed correctly, Link can use a shield block to reflect Guardians' energy beams. Although found mostly in Central Hyrule near Hyrule Castle, some defective ones can be found, in particular at the Temple of Time's ruins near the Great Plateau. Shooting an arrow to its eye can stun it for a short time.

Guardian Scouts
Guardian Scouts can also be found in Shrines and Divine Beasts, they can wield and drop Guardian Swords, Guardian Spears, Ancient Battle Axes, and Guardian Shields of any weapon level (normal, +, and ++).

Guardian Skywatchers
Guardian Skywatchers are flying Guardians found in certain parts of Hyrule, particularly south of Tabantha Tower and Akkala Highlands. They have the same HP, weapon, and body to the Guardian Stalkers.

Decayed Guardians
Decayed Guardians are immobilized versions of Guardian Stalkers located around Hyrule Field and near Ja Baij Shrine (albeit disguised as defective). They are less durable compared to Stalkers, Turrets, and Skywatchers.

Guardian Turrets
Found exclusively in Hyrule Castle. Guardian Turrets behave identically to Decayed Guardians, only with more health and vertical range.

Sentries
Found exclusively in Death Mountain. Guardian Sentries, like the Guardian Skywatchers, hover in the skies and although they are incapable of attacking directly, they can alert any nearby enemies.