AFK pets brings Various NPCs, with townsfolk, wanderers, biome specifics, and even a minigame event.
Boss Hunter Merchant
The Boss Hunter Merchant is a Pre-Hardmode dadTownNPC that sells various items after each vanilla boss has been slain.
Slaying the King Slime or the Eye of Cthulu will unlock this NPC.
The Yandere is a Pre-hardmode TownsNPC that primarily sells modded boss spawners after each one has been slain
Slaying the Slayer of Evil the first time will drop a tied Yandere, which you will have to click her to untie her, unlocking this NPC.
The Fallen Angel is a Hardmode TownNPC that sells angelic themed weapons and hallowed/sky materials.
Crafting Icarus's mirror and using in the desert during daytime will unlock this NPC.
Guide of the End
The Guide of the End is a post-Moonlord NPC that sells weapons, vanities, and event a summoner for Fun-Mode Boss Rush.
Slaying Moon lord will unlock this NPC.
The Artist is a pre-hardmode wandering NPC that sells modded paintings and selected statues.
The Artist also has an ability to trade in golden furniture for statues.
Slaying EOC will unlock this NPC.
The Wandering Samurai is a pre-hardmode wandering NPC that sells various Japanese themed items based on boss progression.
Slaying Okiku will unlock this NPC.
The Designer is a hardmode wandering NPC that sells modded vanity.
The Designer also has an ability to trade Eastern Medicine for a random vanity under the Help Her tab.
The Silent Assassin is a pre-hardmode biome NPC that sells evil biome specific materials and combat potions.
The Silent Assassin also has an ability to imbue the player with fear toxin, that allows all true meele to inflict the Fear debuff, under her Weapon Imbur Fear Toxin tab.
Slaying Slayer of Evil will unlock this NPC (chance to spawn in underground evil biome)
The Researcher is a pre-hardmode wandering NPC that sells items themed around the Desert, Granite, and Marble biomes.
The Researcher also has the ability to fix any negatively modified weapons for free under the Fix Weapon tag.
Slaying Boc/Eow will unlock this NPC (chance to spawn in Desert, Granite, and Marble caves)
The Holy Knight is a pre-hardmode npc that sells dungeon specific items.
The Holy knight also has an ability to trade the Paladin's Hammer or Paladin's Sheild in exchange for different items.
Has a small chance to spawn in the Dungeon.
The Ice Fairy is a hardmode wandering NPC that sells a small selection of snow themed items.
Has a small chance to spawn in the tundra at Hardmode.
Hayco the Hunter
Hayco the Hunter is a Minigame npc that will give the player the option to play a Duck Hunt style minigame.
the player will receive the Hunter's gun and is assigned to shoot down ducks under a time limit.
if the player does not shoot the ducks or shoots only a few, the player will receive nothing.
if the player kills a certain amount of ducks they will receive a Iron Crate.
If the player kills enough ducks they will keep the hunter's gun for themselves.