Piglins are native to the Crimson Forest.
Piglins are semi-neutral mobs that live in the Nether and will attact the player if the player isn't wearing at least one piece of gold armor.
Piglins are afraid of soul fire which is a special type of fire that turns blue in a specific biome in the Nether world.
Piglins get a 4 to 10% chance of trades when a player give the piglin a peice of gold. Piglins also have 18 various items that can be obtained when trading.
There are also baby piglins that are completely neutral that never grow up and dont attack the player, but they just steal things from players because why not.